For Chinese language, the app’s default UI font is Microsoft YaHei UI. Using MS Shell Dlg makes the UI become annoying.
Here are my changes:
diff --git a/res/zh_Hans/res.rc b/res/zh_Hans/res.rc
index 9f67a5a..da9d6e8 100644
--- a/res/zh_Hans/res.rc
+++ b/res/zh_Hans/res.rc
@@ -8,7 +8,7 @@ LANGUAGE LANG_CHINESE, SUBLANG_CHINESE_SIMPLIFIED
 IDD_SOURCE DIALOG 0, 0, SETUP_STANDARD_DIALOG_DIMS
 STYLE DS_MODALFRAME | DS_CENTER | WS_CHILD | WS_CAPTION | WS_SYSMENU
 CAPTION "Cygwin 安装程序 - 选择安装类型"
-FONT 8, "MS Shell Dlg"
+FONT 9, "Microsoft YaHei UI"
 BEGIN
     CONTROL         "从互联网安装(&I)\n（下载的文件将保留以备将来重复使用）",IDC_SOURCE_NETINST,"Button",BS_AUTORADIOBUTTON | WS_GROUP | WS_TABSTOP | BS_MULTILINE | BS_TOP,71,60,200,30
     CONTROL         "下载而不安装(&D)",IDC_SOURCE_DOWNLOAD,"Button",BS_AUTORADIOBUTTON | WS_TABSTOP,71,90,200,10
@@ -22,7 +22,7 @@ END
 IDD_VIRUS DIALOG 0, 0, SETUP_STANDARD_DIALOG_DIMS
 STYLE DS_MODALFRAME | DS_CENTER | WS_CHILD | WS_CAPTION | WS_SYSMENU
 CAPTION "Cygwin 安装程序 - 禁用病毒扫描程序？"
-FONT 8, "MS Shell Dlg"
+FONT 9, "Microsoft YaHei UI"
 BEGIN
     CONTROL         "禁用病毒扫描程序(&D)",IDC_DISABLE_AV,"Button",BS_AUTORADIOBUTTON | WS_GROUP | WS_TABSTOP,101,69,115,10
     CONTROL         "保留病毒扫描程序(&L)",IDC_LEAVE_AV,"Button",BS_AUTORADIOBUTTON | WS_TABSTOP,101,84,115,10
@@ -36,7 +36,7 @@ END
 IDD_LOCAL_DIR DIALOG 0, 0, SETUP_STANDARD_DIALOG_DIMS
 STYLE DS_MODALFRAME | DS_CENTER | WS_CHILD | WS_CAPTION | WS_SYSMENU
 CAPTION "Cygwin 安装程序 - 选择本地软件包目录"
-FONT 8, "MS Shell Dlg"
+FONT 9, "Microsoft YaHei UI"
 BEGIN
     LTEXT           "选择本地软件包目录",IDC_STATIC_HEADER_TITLE,7,0,258,8,NOT WS_GROUP
     LTEXT           "选择希望安装程序存储其下载的安装文件的目录。如果该目录尚不存在，则将创建该目录。",IDC_LOCAL_DIR_DOWNLOAD_DESC,21,9,248,16,NOT WS_GROUP
@@ -51,7 +51,7 @@ END
 IDD_ROOT DIALOG 0, 0, SETUP_STANDARD_DIALOG_DIMS
 STYLE DS_MODALFRAME | DS_CENTER | WS_CHILD | WS_CAPTION | WS_SYSMENU
 CAPTION "Cygwin 安装程序 - 选择安装目录"
-FONT 8, "MS Shell Dlg"
+FONT 9, "Microsoft YaHei UI"
 BEGIN
     LTEXT           "选择根安装目录",IDC_STATIC_HEADER_TITLE,7,0,258,8,NOT WS_GROUP
     LTEXT           "选择要安装 Cygwin 的目录。以及一些安装参数。",IDC_ROOTDIR_SUBTEXT,21,9,239,16,NOT WS_GROUP
@@ -72,7 +72,7 @@ STYLE DS_MODALFRAME | DS_3DLOOK | DS_CENTER | WS_CHILD | WS_VISIBLE |
     WS_CAPTION | WS_SYSMENU
 EXSTYLE WS_EX_CONTROLPARENT
 CAPTION "Cygwin 安装程序 - 选择下载站点"
-FONT 8, "MS Shell Dlg"
+FONT 9, "Microsoft YaHei UI"
 BEGIN
     ICON            IDI_CYGWIN,IDC_HEADICON,SETUP_HEADICON_X,0,21,20
     LISTBOX         IDC_URL_LIST,66,45,185,110,LBS_NOINTEGRALHEIGHT | LBS_EXTENDEDSEL | WS_VSCROLL | WS_HSCROLL | WS_GROUP | WS_TABSTOP
@@ -88,7 +88,7 @@ END
 IDD_NET DIALOG 0, 0, SETUP_STANDARD_DIALOG_DIMS
 STYLE DS_MODALFRAME | DS_CENTER | WS_CHILD | WS_CAPTION | WS_SYSMENU
 CAPTION "Cygwin 安装程序 - 选择连接类型"
-FONT 8, "MS Shell Dlg"
+FONT 9, "Microsoft YaHei UI"
 BEGIN
     CONTROL         "使用系统代理设置(&S)",IDC_NET_PRECONFIG,"Button",BS_AUTORADIOBUTTON | WS_GROUP | WS_TABSTOP,60,55,185,10
     CONTROL         "直接连接(&D)",IDC_NET_DIRECT,"Button",BS_AUTORADIOBUTTON | WS_TABSTOP,60,70,185,10
@@ -108,7 +108,7 @@ IDD_INSTATUS DIALOG 0, 0, SETUP_STANDARD_DIALOG_DIMS
 STYLE DS_MODALFRAME | DS_CENTER | WS_CHILD | WS_VISIBLE | WS_CAPTION |
     WS_SYSMENU
 CAPTION "Cygwin 安装程序"
-FONT 8, "MS Shell Dlg"
+FONT 9, "Microsoft YaHei UI"
 BEGIN
     LTEXT           "正在安装...",IDC_INS_ACTION,45,55,205,8,SS_ENDELLIPSIS
     LTEXT           "（软件包）",IDC_INS_PKG,45,70,205,8,SS_ENDELLIPSIS
@@ -128,7 +128,7 @@ END
 IDD_PROXY_AUTH DIALOG 0, 0, SETUP_SMALL_DIALOG_DIMS
 STYLE DS_MODALFRAME | DS_CENTER | WS_POPUP | WS_CAPTION | WS_SYSMENU
 CAPTION "需要代理身份验证"
-FONT 8, "MS Shell Dlg"
+FONT 9, "Microsoft YaHei UI"
 BEGIN
     ICON            IDI_CYGWIN,IDC_HEADICON,5,5,21,20
     LTEXT           "代理用户 ID(&U)",IDC_STATIC,5,28,55,15,SS_CENTERIMAGE,WS_EX_RIGHT
@@ -143,7 +143,7 @@ END
 IDD_NET_AUTH DIALOG 0, 0, SETUP_SMALL_DIALOG_DIMS
 STYLE DS_MODALFRAME | DS_CENTER | WS_POPUP | WS_CAPTION | WS_SYSMENU
 CAPTION "需要服务器身份验证"
-FONT 8, "MS Shell Dlg"
+FONT 9, "Microsoft YaHei UI"
 BEGIN
     ICON            IDI_CYGWIN,IDC_HEADICON,5,5,21,20
     LTEXT           "用户 ID(&U)",IDC_STATIC,5,28,55,15,SS_CENTERIMAGE,WS_EX_RIGHT
@@ -159,7 +159,7 @@ IDD_SPLASH DIALOG 0, 0, SETUP_STANDARD_DIALOG_DIMS
 STYLE DS_MODALFRAME | DS_3DLOOK | DS_CENTER | WS_CHILD | WS_VISIBLE |
     WS_CAPTION | WS_SYSMENU
 CAPTION "Cygwin 安装程序"
-FONT 8, "MS Shell Dlg"
+FONT 9, "Microsoft YaHei UI"
 BEGIN
     LTEXT           "Cygwin 在线安装程序",IDC_STATIC_WELCOME_TITLE,115,1,195,24
     LTEXT           "本安装程序用于 Cygwin 环境的初始安装以及所有后续更新。以下页面将指导您完成安装。\n\n请注意，默认情况下
，我们只安装一组基本的软件包。Cygwin 提供了大量涵盖各种用途的软件包。\n\n您将来可以随时运行此程序，以根据需要添加、删除或升级软件包。",IDC_SPLASH_TEXT,115,25,195,100
@@ -174,7 +174,7 @@ IDD_DESKTOP DIALOG 0, 0, SETUP_STANDARD_DIALOG_DIMS
 STYLE DS_MODALFRAME | DS_3DLOOK | DS_CENTER | WS_CHILD | WS_VISIBLE |
     WS_CAPTION | WS_SYSMENU
 CAPTION "Cygwin 安装程序 - 安装状态和创建快捷方式"
-FONT 8, "MS Shell Dlg"
+FONT 9, "Microsoft YaHei UI"
 BEGIN
     CONTROL         "在桌面上创建快捷方式(&D)",IDC_ROOT_DESKTOP,"Button",BS_AUTOCHECKBOX,108,78,110,8
     CONTROL         "将快捷方式添加到“开始”菜单(&S)",IDC_ROOT_MENU,"Button",BS_AUTOCHECKBOX,108,93,140,8
@@ -192,7 +192,7 @@ END
 IDD_FTP_AUTH DIALOG 0, 0, SETUP_SMALL_DIALOG_DIMS
 STYLE DS_MODALFRAME | DS_CENTER | WS_POPUP | WS_CAPTION | WS_SYSMENU
 CAPTION "需要 FTP 身份验证"
-FONT 8, "MS Shell Dlg"
+FONT 9, "Microsoft YaHei UI"
 BEGIN
     ICON            IDI_CYGWIN,IDC_HEADICON,5,5,21,20
     LTEXT           "用户 ID(&U)",IDC_STATIC,5,28,55,15,SS_CENTERIMAGE,WS_EX_RIGHT
@@ -208,7 +208,7 @@ IDD_CHOOSE DIALOG 0, 0, SETUP_STANDARD_DIALOG_DIMS
 STYLE DS_MODALFRAME | DS_3DLOOK | WS_CHILD | WS_VISIBLE | WS_CAPTION |
     WS_SYSMENU
 CAPTION "Cygwin 安装程序 - 选择软件包"
-FONT 8, "MS Shell Dlg"
+FONT 9, "Microsoft YaHei UI"
 BEGIN
     LTEXT           "视图(&V)",IDC_CHOOSE_VIEWCAPTION,SETUP_VIEW_X,33,SETUP_VIEW_W,10
     COMBOBOX        IDC_CHOOSE_VIEW,SETUP_VIEWLIST_X,30,SETUP_VIEWLIST_W,84,CBS_DROPDOWNLIST | WS_TABSTOP
@@ -233,7 +233,7 @@ IDD_PREREQ DIALOG 0, 0, SETUP_STANDARD_DIALOG_DIMS
 STYLE DS_MODALFRAME | DS_3DLOOK | WS_CHILD | WS_VISIBLE | WS_CAPTION |
     WS_SYSMENU
 CAPTION "Cygwin 安装程序 - 解决依赖关系"
-FONT 8, "MS Shell Dlg"
+FONT 9, "Microsoft YaHei UI"
 BEGIN
     CONTROL         "",IDC_HEADSEPARATOR,"Static",SS_BLACKFRAME | SS_SUNKEN,0,28,SETUP_STANDARD_DIALOG_W,1
     ICON            IDI_CYGWIN,IDC_HEADICON,SETUP_HEADICON_X,0,21,20
@@ -247,7 +247,7 @@ IDD_CONFIRM DIALOG 0, 0, SETUP_STANDARD_DIALOG_DIMS
 STYLE DS_MODALFRAME | DS_3DLOOK | WS_CHILD | WS_VISIBLE | WS_CAPTION |
     WS_SYSMENU
 CAPTION "Cygwin 安装程序 - 审查并确认更改"
-FONT 8, "MS Shell Dlg"
+FONT 9, "Microsoft YaHei UI"
 BEGIN
     CONTROL         "",IDC_HEADSEPARATOR,"Static",SS_BLACKFRAME | SS_SUNKEN,0,28,SETUP_STANDARD_DIALOG_W,1
     ICON            IDI_CYGWIN,IDC_HEADICON,SETUP_HEADICON_X,0,21,20
@@ -258,7 +258,7 @@ END
 IDD_DROPPED DIALOG 0, 0, SETUP_STANDARD_DIALOG_W, 142
 STYLE DS_MODALFRAME | DS_CENTER | WS_POPUP | WS_CAPTION | WS_SYSMENU
 CAPTION "Cygwin 安装程序 - 使用非官方镜像？"
-FONT 8, "MS Shell Dlg"
+FONT 9, "Microsoft YaHei UI"
 BEGIN
     LTEXT           "警告：",IDC_STATIC,7,8,40,8
     LTEXT           "您选择的一个或多个镜像不再在官方 Cygwin 镜像列表中。它/它们可能已过时或缺少某些软件包。\n这会影响以下镜像：",IDC_STATIC,47,8,263,32
@@ -272,7 +272,7 @@ END
 IDD_DOWNLOAD_ERROR DIALOG 0, 0, SETUP_STANDARD_DIALOG_DIMS
 STYLE DS_MODALFRAME | DS_CENTER | WS_POPUP | WS_CAPTION
 CAPTION "下载不完整"
-FONT 8, "MS Shell Dlg"
+FONT 9, "Microsoft YaHei UI"
 BEGIN
     ICON            IDI_WARNING,IDC_HEADICON,10,10
     LTEXT           "以下软件包出现下载错误：",IDC_STATIC,7,8,320,16
@@ -288,7 +288,7 @@ IDD_POSTINSTALL DIALOG 0, 0, SETUP_STANDARD_DIALOG_W, 142
 STYLE DS_MODALFRAME | DS_3DLOOK | DS_CENTER | WS_CHILD | WS_VISIBLE |
     WS_CAPTION | WS_SYSMENU
 CAPTION "Cygwin 安装程序 - 执行安装后操作"
-FONT 8, "MS Shell Dlg"
+FONT 9, "Microsoft YaHei UI"
 BEGIN
     CONTROL         "",IDC_HEADSEPARATOR,"Static",SS_BLACKFRAME | SS_SUNKEN,0,28,SETUP_STANDARD_DIALOG_W,1
     ICON            IDI_CYGWIN,IDC_HEADICON,SETUP_HEADICON_X,0,21,20
@@ -300,7 +300,7 @@ END
 IDD_FILE_INUSE DIALOG 0, 0, SETUP_MEDIUM_DIALOG_DIMS
 STYLE DS_MODALFRAME | DS_CENTER | WS_POPUP | WS_CAPTION
 CAPTION "检测到正在使用的文件"
-FONT 8, "MS Shell Dlg"
+FONT 9, "Microsoft YaHei UI"
 BEGIN
     ICON            IDI_WARNING,IDC_HEADICON,10,10
     LTEXT           "无法解压缩",IDC_FILE_INUSE_MSG,33,10,234,8,SS_PATHELLIPSIS