要提交的变更：

	修改：     README.md

README.md

@@ -38,9 +38,15 @@ where **your\_file.fits** is the filename of the image which you want to do cosm
 
 如果需要使用CSST仿真数据训练得到的模型扣除宇宙线，下载CSST_2021-12-30_CCD23_epoch20.pth，该模型隐藏层数为50。
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-# 注意
 
-如果使用deepCR自带用HST/ACS数据训练得到的模型，在配置文件中，要将hidden这个配置参数改为32。
+# Warning
+
+* The default training model of deepCR are obtained from HST/ACS data by Zhang and Bloom (2020). If you would like to use the native model rather than the model **CSST\_2021-12-30\_CCD23\_epoch20.pth** obtained from CSST simulated data by **Hu Yi**, you must also change the **hidden** parameters in the configuration file **crmask.ini** to 32. 
+
+* The input images must be **bias-substracted** (either by bias reference fram or overscan region) no matter which algorithm selected, otherwise you will get very inefficient detection rate thus wrong results. Flat-field corrected images are preferable, but not necessary. 
+<!--
+If you would like use the native training model of deepCR, which are obtained from HST/ACS
+如果使用deepCR自带用HST/ACS数据训练得到的模型，在配置文件中，要将hidden这个配置参数改为32。-->