There are many places like Hangzhou. Many times I don't know how to choose. The landlord can learn more about it online. I went to the Grammy.

1. abstain from alcohol and vasodilators one week before operation.

2. Physical health examination: exclude possible medical diseases such as heart, lung, liver and blood, previous surgical history, medication history and allergic history.

3. Wash your hair once a day for 3 days before operation; Sleeping pills can be taken properly one night before operation, and sedatives and painkillers can be used as appropriate half an hour before operation; Decide whether fasting is necessary according to the anesthesia.