Taikang's "E Shun Children's Critical Illness Insurance" covers 500,000-200,000, and the price range is 100-400 yuan. It is a one-year insurance, and the price is relatively low among similar products. This product is insured in insurance, and Jiangsu Province can also be insured. You can claim compensation from the local Taikang company.
The specific coverage and premium can be viewed and calculated on Taikang website or Youbao and other third-party insurance websites.
Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.