diff --git a/mover/linqining/code/task7/call.sh b/mover/linqining/code/task7/call.sh
new file mode 100644
index 000000000..eefe76de1
--- /dev/null
+++ b/mover/linqining/code/task7/call.sh
@@ -0,0 +1,2 @@
+sui client call --package 0x914099b4d1b4f5513acc8aaa4fdc1f67578522b81d818f61bae527d590c6d87d --module check_in --function get_flag \
+--args  0x9338c2a31b74acfaa28613a4cfcf8878f41bb96d6d52b5288760d5261a2bf897 linqining 0xc8dcd54baa7724177593a9f70598a09ae6a4286f996542e058f248209db08147 0x8 --gas-budget 3000000
\ No newline at end of file
diff --git a/mover/linqining/code/task7/check_in/Move.lock b/mover/linqining/code/task7/check_in/Move.lock
new file mode 100644
index 000000000..7804cf00a
--- /dev/null
+++ b/mover/linqining/code/task7/check_in/Move.lock
@@ -0,0 +1,26 @@
+# @generated by Move, please check-in and do not edit manually.
+
+[move]
+version = 3
+manifest_digest = "CADBA560F959A19B76FB7025DC2079CCDB1E948BF9F3E73E0C1FEF81CA1F31FB"
+deps_digest = "F8BBB0CCB2491CA29A3DF03D6F92277A4F3574266507ACD77214D37ECA3F3082"
+dependencies = [
+  { id = "Sui", name = "Sui" },
+]
+
+[[move.package]]
+id = "MoveStdlib"
+source = { git = "https://github.com/MystenLabs/sui.git", rev = "framework/testnet", subdir = "crates/sui-framework/packages/move-stdlib" }
+
+[[move.package]]
+id = "Sui"
+source = { git = "https://github.com/MystenLabs/sui.git", rev = "framework/testnet", subdir = "crates/sui-framework/packages/sui-framework" }
+
+dependencies = [
+  { id = "MoveStdlib", name = "MoveStdlib" },
+]
+
+[move.toolchain-version]
+compiler-version = "1.37.1"
+edition = "2024.beta"
+flavor = "sui"
diff --git a/mover/linqining/code/task7/check_in/Move.toml b/mover/linqining/code/task7/check_in/Move.toml
new file mode 100644
index 000000000..87af25a2b
--- /dev/null
+++ b/mover/linqining/code/task7/check_in/Move.toml
@@ -0,0 +1,37 @@
+[package]
+name = "check_in"
+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]
+check_in = "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/linqining/code/task7/check_in/sources/check_in.move b/mover/linqining/code/task7/check_in/sources/check_in.move
new file mode 100644
index 000000000..69b04d04c
--- /dev/null
+++ b/mover/linqining/code/task7/check_in/sources/check_in.move
@@ -0,0 +1,76 @@
+module check_in::check_in;
+use std::ascii::{String, string};
+use std::bcs;
+use std::hash::sha3_256;
+use std::vector;
+use sui::event;
+use sui::object;
+use sui::random;
+use sui::random::Random;
+use sui::transfer::share_object;
+use sui::tx_context::{Self, TxContext};
+
+const ESTRING: u64 = 0;
+
+public struct Flag has copy, drop {
+    sender: address,
+    flag: bool,
+    ture_num: u64,
+    github_id: String
+}
+
+public struct FlagString has key {
+    id: UID,
+    str: String,
+    ture_num: u64
+}
+
+fun init(ctx: &mut TxContext) {
+    let flag_str = FlagString {
+        id: object::new(ctx),
+        str: string(b"LetsMoveCTF"),
+        ture_num: 0
+    };
+    share_object(flag_str);
+}
+
+
+entry fun get_flag(
+    flag: vector<u8>,
+    github_id: String,
+    flag_str: &mut FlagString,
+    rand: &Random,
+    ctx: &mut TxContext
+) {
+    let mut bcs_flag = bcs::to_bytes(&flag_str.str);
+    vector::append<u8>(&mut bcs_flag, *github_id.as_bytes());
+
+    assert!(flag == sha3_256(bcs_flag), ESTRING);
+
+    flag_str.str = getRandomString(rand, ctx);
+
+    flag_str.ture_num = flag_str.ture_num + 1;
+
+    event::emit(Flag {
+        sender: tx_context::sender(ctx),
+        flag: true,
+        ture_num: flag_str.ture_num,
+        github_id
+    });
+}
+
+
+fun getRandomString(rand: &Random, ctx: &mut TxContext): String {
+    let mut gen = random::new_generator(rand, ctx);
+
+    let mut str_len = random::generate_u8_in_range(&mut gen, 4, 30);
+
+    let mut rand: vector<u8> = b"";
+    while (str_len != 0) {
+        let rand_num = random::generate_u8_in_range(&mut gen, 34, 126);
+        vector::push_back(&mut rand, rand_num);
+        str_len = str_len - 1;
+    };
+
+    string(rand)
+}
diff --git a/mover/linqining/code/task7/check_in/sources/decode b/mover/linqining/code/task7/check_in/sources/decode
new file mode 100755
index 000000000..54865a1eb
Binary files /dev/null and b/mover/linqining/code/task7/check_in/sources/decode differ
diff --git a/mover/linqining/code/task7/check_in/sources/decode.rs b/mover/linqining/code/task7/check_in/sources/decode.rs
new file mode 100644
index 000000000..141c520e8
--- /dev/null
+++ b/mover/linqining/code/task7/check_in/sources/decode.rs
@@ -0,0 +1,19 @@
+use std::io::{self, Write};
+use std::bcs;
+
+fn main() {
+    let str = r">1}y^:jDt$C}M\6(r.-F";
+    let strbyte = str.to_bytes();
+    let unescaped_string = unescape(string_with_escapes).unwrap();
+    let bcs_flag = unescaped_string.bytes();
+    let github_id = b"linqining";
+
+    vector::append<u8>(&mut bcs_flag, github_id);
+    print(&bcs_flag);
+    let str: std::string::String = std::string::utf8(bcs_flag);
+    // print(&str);
+
+    let data = sha3_256(bcs_flag);
+    // let databyte = bcs::to_bytes(&data);
+    print!(data)
+}
diff --git a/mover/linqining/code/task7/check_in/tests/check_in_tests.move b/mover/linqining/code/task7/check_in/tests/check_in_tests.move
new file mode 100644
index 000000000..8c42a6c64
--- /dev/null
+++ b/mover/linqining/code/task7/check_in/tests/check_in_tests.move
@@ -0,0 +1,18 @@
+#[test_only]
+module check_in::check_in_tests;
+// uncomment this line to import the module
+use check_in::check_in;
+
+const ENotImplemented: u64 = 0;
+
+#[test,]
+fun check_in() {
+    check_in::check_in::get_flag()
+}
+
+
+// #[test, expected_failure(abort_code = ::check_in::check_in_tests::ENotImplemented)]
+// fun test_check_in_fail() {
+//     abort ENotImplemented
+// }
+
diff --git a/mover/linqining/images/cli_call.png b/mover/linqining/images/cli_call.png
new file mode 100644
index 000000000..185f0c9e4
Binary files /dev/null and b/mover/linqining/images/cli_call.png differ
diff --git a/mover/linqining/readme.md b/mover/linqining/readme.md
index 16cb4230c..ff44c49c3 100644
--- a/mover/linqining/readme.md
+++ b/mover/linqining/readme.md
@@ -50,8 +50,8 @@
 - [x] save hash : Cssqi4bop5TejjA8AiV9bmEryy3tThXqpWguT1qmxqt3
 
 ##   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/cli_call.png)
+- [x] flag hash : 7SW1NGXYLjPuLLbxrHe4ceDwDe1xjcuvEBCjub11GMYG
 
 ##   08 Move CTF Lets Move
 - [] proof :