diff --git a/applications/subsmt.md b/applications/subsmt.md
index 97f60a02846..3db584e851c 100644
--- a/applications/subsmt.md
+++ b/applications/subsmt.md
@@ -115,11 +115,11 @@ And many zero-knowledge proofs use languages similar to rust or use rust directl
 | **0b.** | Documentation             | We will provide both **inline documentation** of the code and a basic **tutorial** that explains how a user can (for example) spin up one of our Substrate nodes and send test transactions, which will show how the new functionality works. |
 | **0c.** | Testing and Testing Guide | Core functions will be fully covered by comprehensive unit tests to ensure functionality and robustness. In the guide, we will describe how to run these tests.                                                                               |
 | **0d.** | Docker                    | We will provide a Dockerfile(s) that can be used to test all the functionality delivered with this milestone.                                                                                                                                 | 
-|      1. | rust crate: verify root   | An intuitive and gas-saving method for verifying merkel roots, will be provided to the backend for use.                                                                                                                                       |
-|      2. | Substrate module: SMT     | We will create a Substrate module that will verify Merkle root                                                                                                                                                                                |
-|      3. | Smart contracts(ink): SMT | We will deliver a set of ink! smart contracts that will will verify Merkle root                                                                                                                                                               
-|      4. | backend                   | rocksdb store                                                                                                                                                                                                                                 | 
-|      5. | SDK                       | Provide rpc to the backend for updating and deleting, obtaining root, verifying root, get_next_root, etc.                                                                                                                                     |
+|      1. | rust crate: SMT-api       | Provide basic APIs, such as new verify_root method, update, insert and get_futrue_root, etc.                                                                                                                                                  |
+|      2. | Substrate module: SMT     | We will create a Substrate module that will verify Merkle root.                                                                                                                                                                               |
+|      3. | Smart contracts(ink): SMT | We will deliver a set of ink! smart contracts that will will verify Merkle root.                                                                                                                                                              
+|      4. | backend                   | backend, used for permanent storage(based on rocksdb) of off-chain data and provision of rpc services.                                                                                                                                        |
+|      5. | network                   | A basic network with SMT pallet and contract pallet for testing smart contracts and SMT pallet functions.                                                                                                                                     | 
 
 ### Milestone 2 - backend base on parity-db and common backend.
 - **Estimated Duration:** 1 month