4,000 to 9,000 a month. Whale Castle is one of the three brands of baby swimming and water education, including parent-child swimming, water safety self-help, early baby swimming, early water education and children's indoor water park. Swimmers in the company earn 4,000 to 9,000 yuan a month, and are paid on the 20th of each month. Whale Castle Intelligent Breeding Chain belongs to Guangzhou Whale Castle Education Technology Co., Ltd., which is a modern maternal and child enterprise integrating scientific research and development, production, training and sales.