Ping 'an adult critical illness insurance is suitable for people with the age of 18-50 and the maximum renewal age of 60 (inclusive), who are in good health and can work, study and live normally. The insured must be the applicant, spouse, parents or children, and it seems only suitable for Chinese mainland.
Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.