Hengbang Insurance is not one of the top 100 in China, but it is founded and operated by the government and state units; Although unknown, it is also very standardized. I worked on the project cost in China Railway Fourth Bureau, and the unit car was bought in Hengbang. The price is very affordable, and the insurance is also reported, and the service is very fast.
Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.