diff --git a/LICENSE b/LICENSE
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+++ b/LICENSE
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+Copyright (c) USTC(Suzhou) & Huawei Technologies Co., Ltd. 2022. All rights reserved.
+re2-rust licensed under the Mulan PSL v2.
+You can use this software according to the terms and conditions of the Mulan PSL v2.
+You may obtain a copy of Mulan PSL v2 at:
+    http://license.coscl.org.cn/MulanPSL2
+THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY OR FIT FOR A PARTICULAR
+PURPOSE.
+See the Mulan PSL v2 for more details.
+Author: mengning<mengning@ustc.edu.cn>, liuzhitao<freekeeper@mail.ustc.edu.cn>, yangwentong<ywt0821@163.com>
+Create: 2022-06-21
+Description: a compatible RE2 API(
+2021-11-01)  by calling Rust library [regex](https://github.com/rust-lang/regex)
+.