In 2019, Pengtian participated in the DDW held at the San Diego Convention Center in California, USA as scheduled. Recognized as one of the top 50 medical meetings by HCEA, Digestive Disease Week® (DDW) is the world's largest gathering of physicians, researchers and industry in the fields of gastroenterology, hepatology, endoscopy and gastrointestinal surgery.DDW brings physicians, researchers and other industry professionals together to exchange knowledge, formulate ideas and uncover new ways to improve the lives of those living with digestive diseases.