China Taiping Insurance Company was established earlier, 1929, which belongs to the State Council and is a national insurance company.
China Life was established 1949, and the insurance company ranked first;
China PICC is a well-known trademark in China;
China Reinsurance Company did not enter the top ten insurance companies.
Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.