diff --git a/mover/looikaizhi/code/task7/checkin/Move.toml b/mover/looikaizhi/code/task7/checkin/Move.toml
new file mode 100644
index 000000000..2f96ef63f
--- /dev/null
+++ b/mover/looikaizhi/code/task7/checkin/Move.toml
@@ -0,0 +1,37 @@
+[package]
+name = "checkin"
+edition = "2024.beta" # edition = "legacy" to use legacy (pre-2024) Move
+# license = ""           # e.g., "MIT", "GPL", "Apache 2.0"
+# authors = ["..."]      # e.g., ["Joe Smith (joesmith@noemail.com)", "John Snow (johnsnow@noemail.com)"]
+
+[dependencies]
+Sui = { git = "https://github.com/MystenLabs/sui.git", subdir = "crates/sui-framework/packages/sui-framework", rev = "framework/testnet" }
+
+# For remote import, use the `{ git = "...", subdir = "...", rev = "..." }`.
+# Revision can be a branch, a tag, and a commit hash.
+# MyRemotePackage = { git = "https://some.remote/host.git", subdir = "remote/path", rev = "main" }
+
+# For local dependencies use `local = path`. Path is relative to the package root
+# Local = { local = "../path/to" }
+
+# To resolve a version conflict and force a specific version for dependency
+# override use `override = true`
+# Override = { local = "../conflicting/version", override = true }
+
+[addresses]
+checkin = "0x0"
+
+# Named addresses will be accessible in Move as `@name`. They're also exported:
+# for example, `std = "0x1"` is exported by the Standard Library.
+# alice = "0xA11CE"
+
+[dev-dependencies]
+# The dev-dependencies section allows overriding dependencies for `--test` and
+# `--dev` modes. You can introduce test-only dependencies here.
+# Local = { local = "../path/to/dev-build" }
+
+[dev-addresses]
+# The dev-addresses section allows overwriting named addresses for the `--test`
+# and `--dev` modes.
+# alice = "0xB0B"
+
diff --git a/mover/looikaizhi/code/task7/checkin/sources/checkin.move b/mover/looikaizhi/code/task7/checkin/sources/checkin.move
new file mode 100644
index 000000000..8604c0f7f
--- /dev/null
+++ b/mover/looikaizhi/code/task7/checkin/sources/checkin.move
@@ -0,0 +1,26 @@
+module checkin::checkin{
+    use std::ascii::String;
+    use std::hash;
+    use sui::bcs::to_bytes;
+
+    public struct VectorAns has key{
+        id: UID,
+        vec: vector<u8>,
+    }
+
+    fun init(ctx: &mut TxContext){
+        let vectorAns = VectorAns{
+            id: object::new(ctx),
+            vec: vector::empty<u8>(),
+        };
+        transfer::share_object(vectorAns);
+    }
+
+    public entry fun getHash(github_id: String, flagStr: String, vectorAns: &mut VectorAns){
+        let mut v0 = to_bytes(&flagStr);
+        vector::append<u8>(&mut v0, *github_id.as_bytes());
+        vectorAns.vec = hash::sha3_256(v0);
+    }
+
+}
+
diff --git a/mover/looikaizhi/code/task7/checkin/tests/checkin_tests.move b/mover/looikaizhi/code/task7/checkin/tests/checkin_tests.move
new file mode 100644
index 000000000..e69de29bb
diff --git a/mover/looikaizhi/code/task7/task7.ts b/mover/looikaizhi/code/task7/task7.ts
new file mode 100644
index 000000000..36466a30e
--- /dev/null
+++ b/mover/looikaizhi/code/task7/task7.ts
@@ -0,0 +1,35 @@
+import { getFullnodeUrl, SuiClient } from '@mysten/sui/client';
+import { createHash } from 'crypto';
+import { bcs } from '@mysten/sui/bcs';
+
+const rpcUrl = getFullnodeUrl('testnet');
+const client = new SuiClient({url: rpcUrl});
+const flagStringId = '0xc8dcd54baa7724177593a9f70598a09ae6a4286f996542e058f248209db08147';
+const githubID = 'looikaizhi';
+
+async function getFlagStringData() {
+    const flagObject = await client.getObject({id: flagStringId, options: {showContent: true}});
+    const content = flagObject.data?.content;
+    console.log(content);
+    return content.fields.str;
+}
+
+async function calVector() {
+    const flagStr = await getFlagStringData();
+    // 使用BCS序列化
+    const flagStrBytes = bcs.String.serialize(flagStr).toBytes();
+    const githubBytes = Buffer.from(githubID,'utf-8');
+    // 字符串字节添加在BCS后面
+    const combinedBytes = new Uint8Array(flagStrBytes.length + githubBytes.length);
+    combinedBytes.set(flagStrBytes, 0);
+    combinedBytes.set(githubBytes, flagStrBytes.length);
+    // 测试
+    console.log(flagStrBytes);
+    console.log(githubBytes);
+    console.log(combinedBytes);
+    const hash1 = createHash('sha3-256').update(combinedBytes).digest();
+    console.log('最终哈希值:', JSON.stringify(Array.from(hash1)));
+    console.log("hash: ", "0x" + hash1.toString('hex'));
+}
+
+calVector().catch(console.error);
\ No newline at end of file
diff --git a/mover/looikaizhi/code/task8/task8.ts b/mover/looikaizhi/code/task8/task8.ts
new file mode 100644
index 000000000..b4aa4f1ec
--- /dev/null
+++ b/mover/looikaizhi/code/task8/task8.ts
@@ -0,0 +1,48 @@
+import {getFullnodeUrl, SuiClient} from '@mysten/sui/client';
+import {fromBase64} from '@mysten/bcs';
+import { bcs } from '@mysten/sui/bcs';
+import {createHash} from 'crypto';
+
+const rpcUrl = getFullnodeUrl('testnet');
+const client = new SuiClient({url: rpcUrl});
+const challengeID = '0x19e76ca504c5a5fa5e214a45fca6c058171ba333f6da897b82731094504d5ab9';
+const address = '0x0234bddfc4deb68aaddd61b79a5857c1b0a29268a3b2e9d162bc13f45be60e1a';
+// const githubID = 'looikaizhi';
+
+async function findAnswer(){
+    const challenge = await client.getObject({id : challengeID, options:{showBcs:true, showContent: true}});
+    console.log(challenge.data);
+    const data = challenge.data;
+    const content = data?.content;
+    console.log(content);
+
+    const addressBytes = bcs.Address.serialize(address).toBytes();
+    const challengeBytes1 = fromBase64((data!.bcs as any)['bcsBytes']);
+    let nonce = 0;
+    do {
+        const proofBytes = bcs.U64.serialize(nonce).toBytes();
+        const combinedBytes = new Uint8Array(proofBytes.length + addressBytes.length + challengeBytes1.length);
+        combinedBytes.set(proofBytes, 0);
+        combinedBytes.set(addressBytes, proofBytes.length);
+        combinedBytes.set(challengeBytes1, proofBytes.length + addressBytes.length);
+
+        const hash = Array.from(createHash('sha3-256').update(combinedBytes).digest());
+        let prefix_sum = 0;
+        let i = 0;
+        while(i < content?.fields.difficulity){
+            prefix_sum = prefix_sum + hash[i];
+            i += 1;
+        }
+        if(prefix_sum == 0){
+            console.log(`第${nonce}次成功:`, JSON.stringify(Array.from(proofBytes)));
+            console.log("proof: ", "0x" + Buffer.from(proofBytes).toString('hex'))
+            break;
+        }else{
+            nonce++;
+            //console.log(`第${nonce}次失败:`, proofBytes);
+        }
+
+    }while(true)
+}
+
+findAnswer().catch(console.error);
diff --git a/mover/looikaizhi/images/task7.png b/mover/looikaizhi/images/task7.png
new file mode 100644
index 000000000..0dd86e4da
Binary files /dev/null and b/mover/looikaizhi/images/task7.png differ
diff --git a/mover/looikaizhi/readme.md b/mover/looikaizhi/readme.md
index a5d5a92c3..ac405b33d 100644
--- a/mover/looikaizhi/readme.md
+++ b/mover/looikaizhi/readme.md
@@ -47,9 +47,9 @@
 - [x] save hash : `4tXQJ9i55KWrTbp3to2xtSeckkAVTrkbEuq32iY5dLds`
 
 ##   07 Move CTF Check In
-- [] CLI call 截图 : ![截图](./images/你的图片地址)
-- [] flag hash :
+- [x] CLI call 截图 : ![截图](./images/task7.png)
+- [x] flag hash : `Czc3VuGA8ouXBgV9zjNSjD828ni6zUqK9PYPW9YkctRK`
 
 ##   08 Move CTF Lets Move
-- [] proof : 
-- [] flag hash :
+- [x] proof : `0x4b8edc0000000000`
+- [x] flag hash : `2UPwTETe1trUAEVuGh9tvzRsrUVZF8Rqgw8zGLCsUZZt`