Today 955 1 1 sent me a short message with a policy number on it. How should I check?

Hello, you can call 955 1 1 customer service to find out the specific types of insurance, or you can check the policy status in Ping An official website. Listening to your description, Ping An customer service wants to give you a short-term accident insurance, which can't be changed generally.

Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.