连络
联络 (聯絡) lián​luò
contact verb
to get in touch with or maintain communication with others

我会尽快跟你联络的。

wǒ huì jǐn​kuài gēn nǐ lián​luò de.

I will get in touch with you as soon as possible.

connection verb
a mathematical structure on a manifold that relates local geometry at different points

我们通过邮件和老客户保持着紧密的联络。

wǒ​men tōng​guò yóu​jiàn hé lǎo kè​hù bǎo​chí zhe jǐn​mì de lián​luò.

We maintain close contact with our long-standing clients via email.

liaison verb
communication or cooperation that facilitates a close working relationship between people or organizations

他在两家公司之间起到了联络的作用。

tā zài liǎng jiā gōng​sī zhī​jiān qǐ​dào le lián​luò de zuò​yòng.

He served as a liaison between the two companies.