1, internal complaint: First, you can directly complain to the relevant departments or management of China-Japan Friendship Hospital. You can express your dissatisfaction and demands to them by telephone, email or written letter.

2. Hospital Customer Service Department: The China-Japan Friendship Hospital should have a customer service department, and you can contact them to explain your problems and complaints. The customer service department will help you deal with it and try to solve your problem.

3. Supervisory organization or health department: If your complaint in the hospital has not been satisfactorily resolved, you can consider complaining to the relevant supervisory organization or health department. They will evaluate your complaint and take corresponding actions.

4. Legal channels: If you think that your rights and interests have been seriously violated and you can't solve the problem through other channels, you can consult a lawyer and consider taking legal channels to safeguard your rights and interests.