4 sentences

1. 双方签署了一份正式的契约。

   shuāng​fāng qiān​shǔ le yī fèn zhèng​shì de qì​yuē.

   The two sides signed a formal contract.

   Source: Dong Chinese Dictionary

2. 他在这份契约上押了一个记号。

   tā zài zhè fèn qì​yuē shàng yā le yī gè jì​hao.

   He made a mark on this contract.

   Source: Dong Chinese Dictionary

3. 双方在律师的见证下签署了契约。

   shuāng​fāng zài lǜ​shī de jiàn​zhèng xià qiān​shǔ le qì​yuē.

   Both parties signed the contract in the presence of a lawyer.

   Source: Dong Chinese Dictionary

4. 那批重要的契约和文书都封存在府里。

   nà pī zhòng​yào de qì​yuē hé wén​shū dōu fēng​cún zài fǔ lǐ.

   Those important contracts and documents are all sealed away in the mansion.

   Source: Dong Chinese Dictionary