For a three-day outbound tour, consider a nearby country or a relatively small island.
It takes only three and a half hours to get from Beijing to Tokyo, which is almost the time to fly to Guangzhou, but you need to apply for a visa in advance. Now, it may be a bit tight to apply for a Japanese visa. You can visit downtown Tokyo in three days, or you can set aside one day to visit the surrounding areas, such as Hakone, but it will be in a hurry. The direct flight time is limited, and there is no way to leave one night in advance. It only takes off early in the morning on the holiday day, but when it arrives in Narita or Haneda, it will be transferred to the urban area. It is estimated that it will take you around the downtown or business district in the evening. The next day is complete. You can go to Disney or Zhou Bianyou if you want. On the third day, you can take the evening flight back to Beijing, and you can go around the city in the morning and noon. If you decide to go, you should immediately prepare the visa materials.
It&;s closer to South Korea, but you also need to apply for a visa.
If you choose an island, Phuket or Jeju, you can do it. Landing visa, Phuket, and Jeju are visa-free. There&;s nothing wrong with booking a plane ticket in advance.
Have a nice trip!