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% !TEX program = xelatex
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% UPS 自提 / 取件码 — 流程与系统设计示意（TikZ）
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% Overleaf: 使用 fontset=fandol（TeX Live 自带，无需 SimSun）
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% 本地 Windows 可改为: \usepackage[UTF8,scheme=plain]{ctex}\setCJKmainfont{SimSun}
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\documentclass[11pt,a4paper]{article}
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\usepackage[UTF8,scheme=plain,fontset=fandol]{ctex}
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\usepackage{geometry}
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\geometry{margin=2.2cm}
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\usepackage{tikz}
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\usetikzlibrary{
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arrows.meta,
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positioning,
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shapes.geometric,
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shapes.symbols,
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fit,
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backgrounds,
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calc,
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shadows.blur
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}
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\definecolor{UPSbrown}{HTML}{351C15}
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\definecolor{UPSgold}{HTML}{FFB500}
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\definecolor{UPSlight}{HTML}{F5F0E8}
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\usepackage{hyperref}
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\hypersetup{colorlinks=true,linkcolor=UPSbrown,urlcolor=UPSgold}
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\tikzset{
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font=\small,
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actor/.style={
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draw=UPSbrown,
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line width=0.8pt,
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rounded corners=3pt,
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minimum width=2.6cm,
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minimum height=1cm,
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align=center,
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fill=white,
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drop shadow={shadow xshift=1pt,shadow yshift=-1pt}
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},
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sys/.style={
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draw=UPSbrown,
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line width=0.6pt,
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rounded corners=2pt,
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minimum width=3cm,
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minimum height=0.85cm,
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align=center,
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fill=UPSlight
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},
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% 勿用名「step」：与 TikZ 内置 key /tikz/step 冲突（Overleaf 会报 pgfkeys Error）
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flowstep/.style={
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draw=UPSbrown,
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rounded corners=2pt,
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fill=white,
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minimum width=3cm,
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minimum height=0.7cm,
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align=center,
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font=\footnotesize
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},
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flow/.style={-{Stealth[length=2.2mm]}, thick, UPSbrown},
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lab/.style={font=\footnotesize, align=center},
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secret/.style={fill=UPSgold!25, draw=UPSgold!80!black, dashed}
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}
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\title{\textcolor{UPSbrown}{UPS 风格自提点：取件码与系统设计}\\[0.3em]
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\large TikZ 图示（教学/示意，非官方）}
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\author{}
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\date{}
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\begin{document}
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\maketitle
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\begin{abstract}
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\noindent
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本文档用 TikZ 示意「快递员投件 — 平台发码 — 收件人取件」的信息边界：
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投件方通常不掌握收件人取件码；取件码仅通过安全通道下发给收件人。
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\end{abstract}
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% --------------------------------------------------------------------------
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\section{角色与信息可见性}
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\begin{figure}[htbp]
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\centering
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\begin{tikzpicture}[node distance=1.4cm and 2cm]
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\node[actor] (c) {快递员\\（存件/投件）};
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\node[actor, right=3.2cm of c] (s) {发件人\\（电商/个人）};
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\coordinate (midcs) at ($ (c)!0.5!(s) $);
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\node[actor, below=1.8cm of midcs] (r) {收件人};
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\node[sys, right=3cm of r, minimum width=3.4cm] (plat) {物流平台\\\footnotesize 订单 / 轨迹 / 发码};
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\node[sys, below=of plat, minimum width=3.4cm] (lock) {自提柜控制器\\\footnotesize 格口 / 电子锁};
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\draw[flow] (c) -- node[lab, left] {投件扫码\\工号/任务单} (plat);
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\draw[flow] (s) -- node[lab, above, sloped] {运单信息\\（无取件码）} (plat);
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\draw[flow, UPSgold!70!black] (plat) -- node[lab, right] {短信/App\\\textbf{取件码}} (r);
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\draw[flow] (plat) -- node[lab, right] {开格指令} (lock);
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\draw[flow] (c) -- node[lab, below, sloped] {物理投件} (lock);
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\node[secret, rounded corners, fit=(r) (plat), inner sep=8pt, label={[font=\footnotesize]above:\textbf{取件码仅在收件人通道}}] {};
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\end{tikzpicture}
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\caption{示意：发件人与快递员一般不接收「收件取件码」；收件人通过平台下发获得取件码。}
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\label{fig:visibility}
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\end{figure}
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% --------------------------------------------------------------------------
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\section{业务流程（泳道图）}
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\begin{figure}[htbp]
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\centering
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\begin{tikzpicture}[
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x=1cm, y=1cm,
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lane/.style={draw=UPSbrown!40, fill=UPSlight, minimum height=5.2cm, minimum width=3.6cm, anchor=north west}
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]
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% lanes
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\node[lane] (L1) at (0,0) {};
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\node[anchor=north west, font=\bfseries\footnotesize, text=UPSbrown] at (0.15,-0.15) {快递员};
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\node[lane] (L2) at (4,0) {};
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\node[anchor=north west, font=\bfseries\footnotesize, text=UPSbrown] at (4.15,-0.15) {平台};
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\node[lane] (L3) at (8,0) {};
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\node[anchor=north west, font=\bfseries\footnotesize, text=UPSbrown] at (8.15,-0.15) {收件人};
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% courier steps
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\node[flowstep] at (1.8,-1.1) (a1) {到站扫描};
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\node[flowstep, below=0.55 of a1] (a2) {分配格口};
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\node[flowstep, below=0.55 of a2] (a3) {投件关门};
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% platform steps
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\node[flowstep] at (5.8,-1.1) (b1) {校验运单};
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\node[flowstep, below=0.55 of b1] (b2) {生成取件码};
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\node[flowstep, below=0.55 of b2] (b3) {短信/App 推送};
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\node[flowstep, below=0.55 of b3] (b4) {更新状态\\「待取件」};
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% recipient
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\node[flowstep] at (9.8,-1.1) (c1) {收到通知};
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\node[flowstep, below=0.55 of c1] (c2) {到柜输入码};
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\node[flowstep, below=0.55 of c2] (c3) {取件完成};
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\draw[flow] (a1) -- (b1);
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\draw[flow] (b2) -- (c1);
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\path (a3.south) ++(0,-0.2) coordinate (tmpa);
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\draw[flow] (tmpa) -- (tmpa -| b1.west) |- (b1);
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\path (c2.west) ++(-0.6,0) coordinate (tmpr);
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\draw[flow] (c2.west) -- (tmpr) |- (b4.east);
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\end{tikzpicture}
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\caption{泳道示意：平台在投件确认后生成取件码并下发收件人；快递员侧流程与取件码解耦。}
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\label{fig:swimlane}
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\end{figure}
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% --------------------------------------------------------------------------
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\section{系统分层架构}
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\begin{figure}[htbp]
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\centering
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\begin{tikzpicture}[node distance=0.75cm]
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\node[sys, minimum width=10cm, text width=9.6cm] (cli) {客户端层：快递员 App / 收件人 App / 柜机触摸屏};
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\node[sys, minimum width=10cm, text width=9.6cm, below=of cli] (gw) {网关层：API 网关、鉴权、限流、审计日志};
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\node[sys, minimum width=4.5cm, below left=1 and -0.2 of gw] (ord) {订单与运单服务};
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\node[sys, minimum width=4.5cm, below right=1 and -0.2 of gw] (code) {取件码服务\\\footnotesize 生成·绑定·失效};
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\node[sys, minimum width=4.5cm, below=of ord] (dev) {设备接入服务\\\footnotesize 开柜指令·状态回传};
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\node[sys, minimum width=4.5cm, below=of code] (msg) {消息服务\\\footnotesize 短信·推送·邮件};
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\node[sys, minimum width=10cm, text width=9.6cm, below=1.2 of dev.south west, anchor=west, xshift=0] (data) {数据层：运单库、取件码表（哈希）、设备影子、不可变审计};
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\draw[flow] (cli) -- (gw);
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\draw[flow] (gw.south west) ++(1.2,0) -- ++(0,-0.35) -| (ord);
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\draw[flow] (gw.south east) ++(-1.2,0) -- ++(0,-0.35) -| (code);
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\draw[flow] (ord) -- (dev);
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\draw[flow] (code) -- (msg);
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\draw[flow] (dev) -- (data.north -| dev);
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\draw[flow] (msg) -- (data.north -| msg);
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\end{tikzpicture}
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\caption{逻辑分层：取件码由独立服务生成与校验，与投件流水解耦，便于最小权限与审计。}
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\label{fig:architecture}
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\end{figure}
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% --------------------------------------------------------------------------
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\section{取件码生命周期（状态机）}
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\begin{figure}[htbp]
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\centering
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\begin{tikzpicture}[
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stnode/.style={circle, draw=UPSbrown, minimum size=1.15cm, align=center, font=\footnotesize, fill=white},
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acc/.style={-{Stealth}, thick, UPSbrown}
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]
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\node[stnode] (A) {未生成};
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\node[stnode, right=2.8cm of A] (B) {已生成\\未通知};
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\node[stnode, right=2.8cm of B] (C) {已下发};
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\coordinate (midBC) at ($ (B)!0.5!(C) $);
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\node[stnode, below=2cm of midBC] (D) {已核销};
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\node[stnode, left=2.8cm of D, fill=UPSlight] (E) {过期/作废};
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\draw[acc] (A) -- node[above, font=\scriptsize] {投件确认} (B);
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\draw[acc] (B) -- node[above, font=\scriptsize] {推送} (C);
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\draw[acc] (C) -- node[right, font=\scriptsize] {正确输入} (D);
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\draw[acc] (C) -- node[below left, font=\scriptsize] {超时策略} (E);
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\draw[acc] (B) -- node[left, font=\scriptsize] {撤件} (E);
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\end{tikzpicture}
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\caption{取件码状态机示意：实际生产需加入重试、风控冻结、客服人工核销等分支。}
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\label{fig:statemachine}
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\end{figure}
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\vfill
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\noindent\rule{\linewidth}{0.4pt}\\[0.3em]
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{\footnotesize\textcolor{UPSbrown}{Disclaimer:} 图示为通用物流自提逻辑的教学草稿，与 UPS 任何地区正式产品文档无关。配色仅作风格参考。}
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\end{document}
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