Who does Benma owe money to?

According to Cai's inquiry about Chinese law. Guizhou Ma Jun Pentium Decoration Engineering Co., Ltd. wrote an "IOU" on October 5th, 20 14, and owed the plaintiff Cai Ping 4 138 yuan. After repeated collection by plaintiff Cai, the plaintiff filed a lawsuit in court. Therefore, Benma owes Cai Ping money.