1 sentence for 老伙计 (lǎo​huǒ​jì — old friend)

1. 他是父亲多年合作的老伙计了。

   tā shì fù​qīn duō​nián hé​zuò de lǎo​huǒ​jì le.

   He is an old partner who has worked with my father for many years.

   Source: Dong Chinese Dictionary