How long does the tour group usually sign up in advance?

Tour groups departing from Shenzhen generally register one day in advance in Guangdong Province, and the Golden Week may need to be 3-4 days in advance; Domestic tours are generally registered 3-4 days in advance, Golden Week 7- 10 days in advance, overseas long-distance tours 15-20 days in advance, short-distance tours 7 days in advance, and long-distance tours in Golden Week one month in advance.