689 Tianhe North Road, Guangzhou, should be a vast bank. The address of Guangzhou Xinrong Credit Guarantee Co., Ltd. shall be: West Tower of Yangcheng International Trade Center,No. Tiyu East Road 122, Room 310-12. They have a company website. I suggest you contact them to confirm.
Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.