Continues the basic model of the first to third seasons. The main axis is to find 4 young men and 5 women to stay in the "Signal Cabin" in Shenzhen, China, and start co-live under the same roof. The heartbeat detective team lead by Du Hai Tao, Angelababy, Guo Qi Lin, Ma Bo Qian, Song Zu Er, and Li Xue Qin watches from the studio. They witness and try to capture the signals that appear between the potential couples. (Source: Wikipedia)