diff --git a/doc%3A-conf.toml-detail.md b/doc%3A-conf.toml-detail.md
index 518d640..a9dfa25 100644
--- a/doc%3A-conf.toml-detail.md
+++ b/doc%3A-conf.toml-detail.md
@@ -19,7 +19,8 @@ In the file, there will be many stages stating each parser to run. To be more sp
 - resultstatus
 ```
 
-During the `run-joj` process, we will have **several stages** where we will apply different parsers to the code. Those **stages and parsers** are what the users should know how to set.
+During the `run-joj` process, we will have **several stages** where we will apply different parsers to the code. Those **stages and parsers** are what the users should know how to set. The sandbox executor always sends to go-judge. Stages run one by one. Each stage contains an executor that runs command and give the command output, and a parser that parse the output and generate score and comment.
+
 Here are the template code for stages and parsers:
 ```
 [[stages]]