Introduction to swimming groups: Qingdao is warm in winter and cool in summer, making it an excellent place to escape the heat in summer. Every July and August, the place is crowded with people. The highest record in 1997 was 350,000 people swimming here in one day, which is extremely spectacular. Due to the large number of people, the locals also call swimming "dumplings". The picture shows a group of swimmers taking a bath in summer.