Need. According to the information of China Eastern Airlines in official website, the Shenzhen Business Department of China Eastern Airlines issued a notice to the agent, requiring the passengers who had undergone plastic surgery to fly 15 days after the operation, and to issue a diagnosis certificate filled in and stamped by a doctor and a medical record proving the date of the operation before boarding the plane. China Eastern Airlines said that this is to ensure that passengers will not have complications such as blood pressure fluctuation, wound dehiscence, bleeding and infection during the flight, so a certificate is required for the whole flight.