1 sentence

1. 为了确保交易公正，买卖双方请了一位中人来做见证。

   wèi​le què​bǎo jiāo​yì gōng​zhèng, mǎi​mai shuāng​fāng qǐng le yī wèi zhōng​rén lái zuò jiàn​zhèng.

   To ensure a fair transaction, both the buyer and the seller invited a middleman to be a witness.

   Source: Dong Chinese Dictionary