Health insurance with E is critical illness insurance, which is also easy to understand literally. For example, cardiovascular and cerebrovascular diseases, tumors and the like are all covered by insurance. Accidental injuries, natural disasters and man-made disasters are not covered by insurance. I bought this. This insurance basically covers all major diseases we can think of, such as heart disease and cancer. As long as it is a serious illness, it is almost guaranteed. Few major diseases have been exempted, even Ebola. As long as it is not an accident, it can basically protect you, so I feel that this coverage is relatively wide and it is quite suitable.
Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.