Why did Poly use R&F to build the general contractor?

Because R&F is a subsidiary of Poly Real Estate.

R&F Construction Group Co., Ltd. is a wholly-owned subsidiary of Poly Development Holding Group, which is positioned as the strategic coordinator of real estate investment and development business of Poly Development Holding Group.

R&F Group was established in 1994, and its headquarters is in Guangzhou. After more than 20 years of rapid development, it has become a comprehensive group with real estate development as its main business and diversified development in the fields of hotel development, commercial operation, cultural and sports tourism, Internet production and trade, medical and health care, property services, design and construction, and innovative service platforms.