Hainan Jacky Architectural Design Company owes money and doesn't pay it back. What should I do?

Suggest negotiation. If negotiation fails, a lawsuit shall be brought to the people's court with relevant evidential materials, and the other party may be required to pay interest or liquidated damages at the same time.

code of civil law

Article 119 A prosecution must meet the following conditions:

(1) The plaintiff is a citizen, legal person and other organization that has a direct interest in the case;

(2) Having a clear defendant;

(3) Having specific requests, facts and reasons;

(4) It falls within the scope of civil litigation accepted by the people's court and is under the jurisdiction of the sued people's court.