2 sentences

1. 他在大学期间加入了一个校友联谊会。

   tā zài dà​xué qī​jiān jiā​rù le yī gè xiào​yǒu lián​yì​huì.

   He joined an alumni association during university.

   Source: Dong Chinese Dictionary

2. 公司人力资源部组织了一场单身青年联谊会。

   gōng​sī rén​lì zī​yuán​bù zǔ​zhī le yī cháng dān​shēn qīng​nián lián​yì​huì.

   The company's HR department organized a social mixer for single young people.

   Source: Dong Chinese Dictionary