diff --git a/IFRT/README.md b/IFRT/README.md
index 5eb5a6b..6640347 100644
--- a/IFRT/README.md
+++ b/IFRT/README.md
@@ -9,7 +9,15 @@ Submitting features is also allowed, you can send an e-mail to us to request the
 
 ## How to Participate
 
-Send an e-mail to [..] after preparing your black-box feature extractor or image binary features. With your name, organization and submission comments.
+Send an e-mail to [..] after preparing your black-box feature extractor or image binary features, with your name, organization and submission comments.
+
+There are some ways to submit:
+
+1. (Recommended) Submit black-box face feature extracting tool.
+2. (Simplest) Submit your recognition model.
+    * Submit MXNet ArcFace model with the same face alignment. In this case, you can just submit the single model file.
+    * In other case, such as PyTorch/TF models or ArcFace models with different face alignment method, please give us an example on how to generate feature embeddings. (eg. provide a function `get_feature(image, landmark)`)
+3. (Safe) Submit face features. We will give `N` test images named from `0.jpg` to `(N-1).jpg`. Then you should submit a binary feature file with shape `(N,K)` where `K` is your feature dimension. L2 distance will be used on these features.
 
 ## Leaderboard