diff --git a/build.sh b/build.sh
index b86659e..8c83ff5 100755
--- a/build.sh
+++ b/build.sh
@@ -83,7 +83,8 @@ fi
 
 cd ../
 if [ -f ./build/CMakeCache.txt ]; then
-    rm -rf ./build/*
+    echo ""
+    #rm -rf ./build/*
 else
     mkdir build
 fi
diff --git a/hgdriver/hgdev/hg_scanner_239.cpp b/hgdriver/hgdev/hg_scanner_239.cpp
index 9f32f53..08a06b4 100644
--- a/hgdriver/hgdev/hg_scanner_239.cpp
+++ b/hgdriver/hgdev/hg_scanner_239.cpp
@@ -1458,7 +1458,7 @@ void hg_scanner_239::thread_handle_usb_read(void)
 		}
 		if (ret == SCANNER_ERR_TIMEOUT)
 		{
-			if (++to_cnt > 10)
+			if (++to_cnt > 20)
 			{
 				status_ = ret;
 				notify_ui_working_status("通信超时", SANE_EVENT_ERROR, ret);
diff --git a/hgdriver/hgdev/scanner_manager.cpp b/hgdriver/hgdev/scanner_manager.cpp
index 1ca729f..ffcd97f 100644
--- a/hgdriver/hgdev/scanner_manager.cpp
+++ b/hgdriver/hgdev/scanner_manager.cpp
@@ -24,20 +24,20 @@ static struct
     std::string rsc;        // USB resource, version-addr. e.g. "USB2.0-1"
 }
 g_supporting_devices[] = {
-#ifdef OEM_LISICHENG
+//#ifdef OEM_LISICHENG
                            {0x31c9, 0x8420, SCANNER_NAME_LSC_G42S, "G426xF", ""}
                          , {0x31c9, 0x8520, SCANNER_NAME_LSC_G52S, "G52x0F", ""}
                          , {0x31c9, 0x8620, SCANNER_NAME_LSC_G62S, "G6290U", ""}
                          , {0x31c9, 0x8629, SCANNER_NAME_LSC_G62S, "G6290U", ""}
                          , {0x31c9, 0x8730, SCANNER_NAME_LSC_G73S, "G73x0U", ""}
                          , {0x31c9, 0x8739, SCANNER_NAME_LSC_G73S, "G73x0U", ""},
-#endif
-#ifdef OEM_HANWANG
+//#endif
+//#ifdef OEM_HANWANG
                            {0x2903, 0x7000, SCANNER_NAME_HW_7000, "HW-74x0WA", ""}
                          , {0x2903, 0x1000, SCANNER_NAME_HW_1060A, "HW-1060A", ""}
                          , {0x2903, 0x8000, SCANNER_NAME_HW_8090F, "HW-8090F", ""}
                          , {0x2903, 0x9000, SCANNER_NAME_HW_9110F, "HW-9110F", ""},
-#endif
+//#endif
                            {0x3072, 0x100, SCANNER_NAME_HG_G100, "GScanO200", ""}
                          , {0x3072, 0x200, SCANNER_NAME_HG_G200, "GScanO200", ""}
                          , {0x3072, 0x300, SCANNER_NAME_HG_G300, "GScanO400", ""}