Let's fall in love is an observational emotional reasoning reality show. In the third season of the program, several single young people with different personalities and charm will come from the noisy city to Yunnan surrounded by forests and green mountains and return to the summer when they were children. They put down their work, spend 16 days together day and night, and spend a long romantic holiday with each other. During this holiday, the program group will set up various dating opportunities, daily bedtime talk and other unique links to create opportunities for ordinary people to get along with each other. They will also experience the ups and downs before and after love, the joys and sorrows in ordinary life and the ups and downs in getting along, so as to show the most real relationship mode and love way of young people at present. As an off-site love observer, star guests will observe the daily life details of several plain single men and women, speculate their emotional changes and relationship trend, and convey and advocate a positive outlook on love for contemporary young people.