diff --git a/ObservationSim/Instrument/data/field_distortion/FieldDistModelGlobal_pr4_fgs1.pickle b/ObservationSim/Instrument/data/field_distortion/FieldDistModelGlobal_pr4_fgs1.pickle
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diff --git a/ObservationSim/Instrument/data/field_distortion/FieldDistModelGlobal_pr4_fgs2.pickle b/ObservationSim/Instrument/data/field_distortion/FieldDistModelGlobal_pr4_fgs2.pickle
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diff --git a/ObservationSim/Instrument/data/field_distortion/FieldDistModelGlobal_pr4_fgs3.pickle b/ObservationSim/Instrument/data/field_distortion/FieldDistModelGlobal_pr4_fgs3.pickle
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diff --git a/ObservationSim/Instrument/data/field_distortion/FieldDistModelGlobal_pr4_fgs4.pickle b/ObservationSim/Instrument/data/field_distortion/FieldDistModelGlobal_pr4_fgs4.pickle
index 0f4155f89f1e372d2060d35c7bd482bf880b10b1..3cc84f252816985f0f1f3f2242d488681f7c9926 100644
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diff --git a/README.md b/README.md
index b050654cef82d157d6b9f902d354e4a9afb578cb..30fdb07c89f6e38f4f5a67abfe29ec4bf6948b49 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,12 @@
 # CSST主巡天仿真软件
 
 ## 重要更新或问题修复：
-
+* 2023.07.29: 更新至v2.1版本，内容包括：
+    * 加入杂散光模块，config文件中添加开关：enable_straylight_model: True/False
+    * 调整WCS定义：x：E, y：-N
+    * 头文件关键字调整
+    * 适配C6-50平方度仿真星表
+    * Bug修复：修复像场畸变导致形变的方向错误等bug
 * 2023.05.01: 更新至v2.0版本，新功能包含：
     * C6仿真实现
     * fits贴图功能
diff --git a/config/config_fgs.yaml b/config/config_fgs.yaml
index 3a0d021da04ac8428696fe10ae2396e90bbe0c20..72456bc62d97b442e98e929799c01a5c0850931a 100644
--- a/config/config_fgs.yaml
+++ b/config/config_fgs.yaml
@@ -15,7 +15,7 @@ run_name: "fgs_test"
 
 # Whether to use MPI
 run_option:
-  use_mpi: YES
+  use_mpi: NO
   # NOTE: "n_threads" paramters is currently not used in the backend
   # simulation codes. It should be implemented later in the web frontend
   # in order to config the number of threads to request from NAOC cluster
@@ -107,6 +107,9 @@ obs_setting:
   # Whether to enable astrometric modeling
   enable_astrometric_model: True
 
+  # Whether to enable straylight model
+  enable_straylight_model: True
+
   # Cut by saturation magnitude in which band?
   cut_in_band: "FGS"
 
diff --git a/profile_C6.sh b/profile_C6.sh
index 49c79694a11d0082b595dfecf68e03b5ccca03a2..33ba60543657be15aefce50f1e7d109971cc90c2 100755
--- a/profile_C6.sh
+++ b/profile_C6.sh
@@ -3,10 +3,14 @@
 date
 
 python -m cProfile -o C6_profiler_test.pstats /share/home/fangyuedong/csst-simulation/run_sim.py \
-    --config_file config_50sqdeg.yaml \
-    --catalog C6_50sqdeg \
+    --config_file config_fgs.yaml \
+    --catalog FGS_Catalog \
     -c /share/home/fangyuedong/csst-simulation/config
 
+    # --config_file config_50sqdeg.yaml \
+    # --catalog C6_50sqdeg \
+    # -c /share/home/fangyuedong/csst-simulation/config
+
     # --config_file config_C6.yaml \
     # --catalog C6_Catalog \
     # -c /share/home/fangyuedong/csst-simulation/config