搭鹊桥 - Chinese Idiom

搭鹊桥:

Literally means:

build bridge of magpies; act as a match maker

Actually means:

According to the Chinese folklore, the magpies formed a bridge over the milk way so that the two lovers Herd-boy and Weaving-girl from heaven could meet on the bridge. It figuratively means helping match a couple.

The third party helps establish ties between two parties.

民间传说喜鹊在银河搭了桥，使天上的织女和牛郎相会。比喻帮助男女谈成恋爱，结为夫妻。

作为第三方，通过努力帮助两方面建立联系。