A man named Liu Haibin lives in Xiamen city, Fujian Province, while his wife and 8-month-old son live in Tengzhou City, Shandong Province. Because of work, he cannot live with the family and take care of his son. To remedy this, he built two seesaws attached with a HD screen so that they can see each other. By using remote synchronization sensors and weight sensor equipment, he can play on the seesaw with his son as if they were together in the park, instead of being 1180km away. Recently, he posted the footage on the internet and the video went viral rapidly. He said the reason for building the creative toy is to let his son know that his father loves him very much even when he is not beside him.