4 sentences

1. 做买卖讲究的是诚信。

   zuò mǎi​mai jiǎng​jiu de shì chéng​xìn.

   Doing business is all about integrity.

   Source: Dong Chinese Dictionary

2. 企业应该坚持诚信经营。

   qǐ​yè yīng​gāi jiān​chí chéng​xìn jīng​yíng.

   Enterprises should adhere to honest and trustworthy business practices.

   Source: Dong Chinese Dictionary

3. 诚信是他们公司赢得客户信任的法宝。

   chéng​xìn shì tā​men gōng​sī yíng​dé kè​hù xìn​rèn de fǎ​bǎo.

   Integrity is the 'magic weapon' for their company to win customers' trust.

   Source: Dong Chinese Dictionary

4. 诚信经营是一个商人必须守住的底线。

   chéng​xìn jīng​yíng shì yī gè shāng​rén bì​xū shǒu​zhu de dǐ​xiàn.

   Operating with integrity is a bottom line that every merchant must uphold.

   Source: Dong Chinese Dictionary