diff --git a/subpackages/mine/checkin/checkin.js b/subpackages/mine/checkin/checkin.js
index f1e8ee6..5bdcd08 100644
--- a/subpackages/mine/checkin/checkin.js
+++ b/subpackages/mine/checkin/checkin.js
@@ -7,9 +7,7 @@ Page({
     projects: [],
     projectNames: [],
     projectIndex: 0,
-    groups: [],
-    groupNames: [],
-    groupIndex: 0,
+    currentProjectName: '',
     units: [],
     pendingUnits: [],
     checkedUnits: [],
@@ -25,7 +23,7 @@ Page({
   onLoad() { this.loadContext(); },
 
   onPullDownRefresh() {
-    this.loadContext(this.currentProjectId(), this.currentGroupId()).finally(() => wx.stopPullDownRefresh());
+    this.loadContext(this.currentProjectId()).finally(() => wx.stopPullDownRefresh());
   },
 
   currentProjectId() {
@@ -33,14 +31,9 @@ Page({
     return item && item.eventProjectId;
   },
 
-  currentGroupId() {
-    const item = this.data.groups[this.data.groupIndex];
-    return item && item.id;
-  },
-
-  loadContext(eventProjectId, groupId) {
+  loadContext(eventProjectId) {
     this.setData({ loading: true });
-    return competition.fetchCurrentCheckin({ eventProjectId, groupId })
+    return competition.fetchCurrentCheckin({ eventProjectId })
       .then((context) => this.applyContext(context))
       .catch((err) => wx.showToast({ title: (err && err.message) || '检录信息加载失败', icon: 'none' }))
       .finally(() => this.setData({ loading: false }));
@@ -50,9 +43,6 @@ Page({
     const projects = (context && context.projects) || [];
     let projectIndex = projects.findIndex((item) => String(item.eventProjectId) === String(context.selectedEventProjectId));
     if (projectIndex < 0) projectIndex = 0;
-    const groups = (projects[projectIndex] && projects[projectIndex].groups) || [];
-    let groupIndex = groups.findIndex((item) => String(item.id) === String(context.selectedGroupId));
-    if (groupIndex < 0) groupIndex = 0;
     const units = (context && context.units) || [];
     const pendingUnits = Array.isArray(context && context.pendingUnits) ? context.pendingUnits : units.filter((item) => item.canCheck && !item.checked);
     const checkedUnits = Array.isArray(context && context.checkedUnits) ? context.checkedUnits : units.filter((item) => item.checked);
@@ -84,9 +74,7 @@ Page({
       projects,
       projectNames: projects.map((item) => item.projectName),
       projectIndex,
-      groups,
-      groupNames: groups.map((item) => item.groupName),
-      groupIndex,
+      currentProjectName: (projects[projectIndex] && projects[projectIndex].projectName) || '',
       units,
       pendingUnits,
       checkedUnits,
@@ -103,33 +91,23 @@ Page({
     const projectIndex = Number(e.currentTarget.dataset.index) || 0;
     if (projectIndex === this.data.projectIndex) return;
     const project = this.data.projects[projectIndex];
-    const group = project && project.groups && project.groups[0];
-    if (project && group) this.loadContext(project.eventProjectId, group.id);
-  },
-
-  onGroupTap(e) {
-    if (this.data.loading) return;
-    const groupIndex = Number(e.currentTarget.dataset.index) || 0;
-    if (groupIndex === this.data.groupIndex) return;
-    const group = this.data.groups[groupIndex];
-    if (group) this.loadContext(this.currentProjectId(), group.id);
+    if (project) this.loadContext(project.eventProjectId);
   },
 
   onStartCheckin() {
     if (this.data.actionLoading) return;
     const eventProjectId = this.currentProjectId();
-    const groupId = this.currentGroupId();
     wx.showModal({
       title: '开始检录',
-      content: '开始后将通知本组报名人员，确认继续吗？',
+      content: '开始后将按秩序册顺序检录该项目全部组别，并通知报名人员，确认继续吗？',
       success: (res) => {
         if (!res.confirm) return;
         this.setData({ actionLoading: true });
-        competition.startCheckin({ eventProjectId, groupId })
+        competition.startCheckin({ eventProjectId })
           .then((result) => {
             if (result && result.context) this.applyContext(result.context);
             wx.showToast({ title: (result && result.message) || '检录已开始', icon: 'none' });
-            if (!(result && result.context)) return this.loadContext(eventProjectId, groupId);
+            if (!(result && result.context)) return this.loadContext(eventProjectId);
           })
           .catch((err) => wx.showToast({ title: (err && err.message) || '开始检录失败', icon: 'none' }))
           .finally(() => this.setData({ actionLoading: false }));
@@ -145,8 +123,7 @@ Page({
         this.setData({ actionLoading: true });
         competition.scanCheckin({
           code: scan.result,
-          eventProjectId: this.currentProjectId(),
-          groupId: this.currentGroupId()
+          eventProjectId: this.currentProjectId()
         }).then((result) => {
           // 后端在号码布不匹配时返回 success:false + message 且不带 context，
           // 必须照样给出提示，否则检录员扫错码时收不到任何反馈。
@@ -156,7 +133,7 @@ Page({
             title: (result && result.message) || (ok ? '扫码检录成功' : '扫码检录失败'),
             icon: ok ? 'success' : 'none'
           });
-          if (!(result && result.context)) return this.loadContext(this.currentProjectId(), this.currentGroupId());
+          if (!(result && result.context)) return this.loadContext(this.currentProjectId());
         }).catch((err) => wx.showToast({ title: (err && err.message) || '扫码检录失败', icon: 'none' }))
           .finally(() => this.setData({ actionLoading: false }));
       }
@@ -169,8 +146,7 @@ Page({
     this.setData({ updatingKey: unitKey });
     competition.markCheckinOnStage({
       unitKey,
-      eventProjectId: this.currentProjectId(),
-      groupId: this.currentGroupId()
+      eventProjectId: this.currentProjectId()
     }).then((context) => {
       if (context) this.applyContext(context);
       wx.showToast({ title: '已标记上场', icon: 'success' });
@@ -205,7 +181,6 @@ Page({
     competition.updateCheckinStatus({
       unitKey,
       eventProjectId: this.currentProjectId(),
-      groupId: this.currentGroupId(),
       checked
     }).then((res) => {
       this.applyContext(res);
diff --git a/subpackages/mine/checkin/checkin.wxml b/subpackages/mine/checkin/checkin.wxml
index a404d95..7a88e34 100644
--- a/subpackages/mine/checkin/checkin.wxml
+++ b/subpackages/mine/checkin/checkin.wxml
@@ -12,8 +12,8 @@
       </view>
       <view class="compact-divider"></view>
       <view class="compact-status-item group-status-item">
-        <text class="compact-label">当前组别</text>
-        <text class="compact-value">{{context.currentGroupName || '请选择组别'}}</text>
+        <text class="compact-label">当前项目</text>
+        <text class="compact-value">{{currentProjectName || '请选择项目'}}</text>
       </view>
     </view>
   </view>
@@ -40,30 +40,10 @@
       </view>
     </scroll-view>
 
-    <view class="selector-separator"></view>
-
-    <view class="selector-heading group-heading">
-      <view class="selector-step">2</view>
-      <view class="selector-heading-text"><text class="selector-title">选择参赛组别</text><text class="selector-hint">点击后立即切换检录名单</text></view>
-    </view>
-    <scroll-view class="group-scroll" scroll-x enhanced show-scrollbar="{{false}}" scroll-with-animation>
-      <view class="group-options">
-        <view
-          wx:for="{{groups}}"
-          wx:key="id"
-          class="group-option {{index === groupIndex ? 'active' : ''}} {{item.isCompleted ? 'completed' : ''}}"
-          data-index="{{index}}"
-          bindtap="onGroupTap"
-        >
-          <view class="group-active-dot"></view>
-          <view class="group-option-content"><text class="group-option-name">{{item.groupName}}</text><text class="group-option-progress">{{item.checkedUnits}}/{{item.totalUnits}} · {{item.isCompleted ? '已完成' : item.progressPercent + '%'}}</text></view>
-        </view>
-      </view>
-    </scroll-view>
   </view>
 
   <view class="checkin-toolbar" wx:if="{{context}}">
-    <button class="toolbar-btn toolbar-btn--primary" loading="{{actionLoading}}" disabled="{{actionLoading}}" bindtap="onStartCheckin">开始当前组检录</button>
+    <button class="toolbar-btn toolbar-btn--primary" loading="{{actionLoading}}" disabled="{{actionLoading}}" bindtap="onStartCheckin">开始当前项目检录</button>
     <button class="toolbar-btn" disabled="{{actionLoading}}" bindtap="onScanCheckin">扫码检录</button>
   </view>
 
@@ -71,7 +51,7 @@
 
   <block wx:if="{{context}}">
     <view class="progress-card">
-      <view class="progress-top"><text class="section-title">当前组别进度</text><text class="progress-count"><text class="progress-count-main">{{checkedCount}}</text> / {{units.length}} 项</text></view>
+      <view class="progress-top"><text class="section-title">当前项目进度</text><text class="progress-count"><text class="progress-count-main">{{checkedCount}}</text> / {{units.length}} 项</text></view>
       <view class="progress-track"><view class="progress-fill" style="width: {{progressPercent}}%;"></view></view>
       <view class="progress-bottom"><text>已检录 {{checkedCount}} 项</text><text>待检录 {{pendingCount}} 项</text></view>
     </view>
@@ -83,7 +63,7 @@
       <view class="unit-athletes"><text class="athlete-chip" wx:for="{{item.athletes}}" wx:for-item="athlete" wx:key="id">{{athlete.name}}</text></view>
       <view class="unit-action {{updatingKey === item.unitKey ? 'disabled' : ''}}" data-key="{{item.unitKey}}" bindtap="onToggleUnit">确认检录</view>
     </view>
-    <view wx:if="{{!pendingUnits.length}}" class="empty-tip">当前组别暂无待检录项</view>
+    <view wx:if="{{!pendingUnits.length}}" class="empty-tip">当前项目暂无待检录项</view>
 
     <view class="list-heading" wx:if="{{lockedUnits.length}}"><text class="section-title">等待前序检录</text><text class="list-tip">前一检通过后可操作</text></view>
     <view class="unit-card locked" wx:for="{{lockedUnits}}" wx:key="unitKey">
@@ -95,7 +75,7 @@
 
     <view class="checked-section-head">
       <view class="checked-section-title"><text class="section-title">已检录</text><text class="checked-count">{{checkedUnits.length}} 项</text></view>
-      <text class="scope-tip">仅展示当前选中项目和组别的已检录结果</text>
+      <text class="scope-tip">展示当前项目全部组别的已检录结果</text>
     </view>
     <block wx:for="{{checkedGroups}}" wx:for-item="checkedGroup" wx:key="key">
       <view class="checked-group-head">
diff --git a/utils/competition.js b/utils/competition.js
index cecaa7e..e017b7f 100644
--- a/utils/competition.js
+++ b/utils/competition.js
@@ -41,11 +41,10 @@ function updateCheckinStatus({ unitKey, eventProjectId, groupId, checked }) {
 
 function startCheckin({ eventProjectId, groupId } = {}) {
   if (isEmptyValue(eventProjectId)) return rejectWith('请选择检录项目');
-  if (isEmptyValue(groupId)) return rejectWith('请选择检录组别');
   return request({
     path: API.checkinStart,
     method: 'POST',
-    data: { eventProjectId, groupId },
+    data: withScope({ eventProjectId }, eventProjectId, groupId),
     needAuth: true
   });
 }