diff --git a/twain/twain/huagaods.cpp b/twain/twain/huagaods.cpp
index f73cec7..9c3584b 100644
--- a/twain/twain/huagaods.cpp
+++ b/twain/twain/huagaods.cpp
@@ -1028,6 +1028,22 @@ Result huagao_ds::identityOpenDs(const Identity& id)
 	}
 	load_sane_util::to_log(1, L"Double check mode = %d\r\n", double_check_mode_);
 
+	int nobd = get_config_number(L"twain-app", L"no-bitdepth", 0, -1);
+	if (nobd == -1)
+	{
+		wchar_t	pe[MAX_PATH] = { 0 }, * name = NULL;
+		GetModuleFileNameW(NULL, pe, _countof(pe) - 1);
+		name = wcsrchr(pe, L'\\');
+		if (name++ == NULL)
+			name = pe;
+		if (wcsicmp(name, L"\u519B\u961F\u626B\u63CF2.0.exe") == 0)	// 军队扫描2.0.exe
+			nobd = 1;
+		else
+			nobd = 0;
+	}
+	no_bitdepth_ = nobd == 1;
+	load_sane_util::to_log(1, L"BitDepth protocol enabled = %d\r\n", nobd);
+
 	m_compression = Compression::None;
 	init_support_caps();
 	m_fileXfer.setFormat(ImageFileFormat::Bmp);
@@ -1938,6 +1954,8 @@ void huagao_ds::init_support_caps(void)
 		int val = 0;
 		GET_SANE_OPT_EX(int, scanner_, ex_color_mode, NULL, &all);
 		if (Msg::Set == msg || Msg::Reset == msg) {
+			if (no_bitdepth_)
+				return success();
 			int	ret = SCANNER_ERR_INVALID_PARAMETER;
 			val = all[sane_opts::RANGE_POS_DEFAULT];
 			auto mech = data.currentItem<CapType::IBitDepth>();
diff --git a/twain/twain/huagaods.hpp b/twain/twain/huagaods.hpp
index 6b54bcc..3bae343 100644
--- a/twain/twain/huagaods.hpp
+++ b/twain/twain/huagaods.hpp
@@ -56,6 +56,7 @@ class huagao_ds : public Twpp::SourceFromThis<huagao_ds> {
     bool            app_trigger_event_;
     bool            bUiOnly_;
     bool            show_setting_;
+    bool            no_bitdepth_ = false;   // ����ɨ��2.0.exe set this but sychronize to APP
     int             count_;
 
     volatile bool   notfify_close_ = false;
@@ -79,7 +80,7 @@ class huagao_ds : public Twpp::SourceFromThis<huagao_ds> {
     void init_support_caps_ex(void);
     std::wstring get_config_file(void);
     std::wstring get_config_value(const wchar_t* sec, const wchar_t* key);
-    DWORD get_config_number(const wchar_t* sec, const wchar_t* key);
+    DWORD get_config_number(const wchar_t* sec, const wchar_t* key, DWORD def = 0, DWORD empty = 0);
     int handle_scanner_event(int ev, bool from_event_proc = true);
     int get_scanned_image_count(DWORD timeout);
     void trigger_ProcessEvent(Twpp::DataGroup dg, Twpp::Dat dat, Twpp::Msg msg);