The foreign teachers should bring any long-term medications with them, since many western medicines are not available in China. Supply should be sufficient to cover the length of stay plus one month. A person cannot count on renewing a prescription in China. However, it is a good idea to have a copy of the original prescription with your documents so that in the case of emergency, people will know what medications your are taking for what condition.
It is highly recommended that anyone traveling to China carry their own health insurance from their home nation. In China, insurance cards are not recognized and the person must pay for everything in cash, get receipts, and then take up reimbursement questions with their insurance company.
It is wise to bring an extra pair of glasses and/or contact lenses when coming to China. One should remember that the air quality in China is often poor and this affects those who wear contact lenses. It is recommended that the person also bring the glasses/contact lens prescription and specifications for replacement purposes, if necessary.