Is Qingdao's past related to Defa?

In the past in Qingdao, Daima and Defa were partners. In the play, the three men got the first pot of gold from Flichy, Germany, and jointly opened the firm "Deyouju", which opened the road of shopping mall tourism.

In the TV series "Qingdao Past", Damen, Defa and Xiaoman grew up together and had a very good relationship. Damon and Defa often do business together, and they have a very close relationship. As their sister, Mandy often participates in business activities and is closely related to them.