收执

hé tong yī shì liǎng fèn jiāo shuāng fāng shōu zhí

合同一式两份交双方收执。

The contract shall be made in duplicate and submitted to both parties for receipt.

dì èr lián wéi fā piào lián shōu zhí fāng zuò wéi fù kuǎn huò shōu kuǎn yuán shǐ píng zhèng

第二联为发票联，收执方作为付款或收款原始凭证。

The second form is the invoice form, the receiver uses it as the primitive voucher for paying or receiving money.