1, the number of rooms unlocked into a double-family apartment: the number of unlocked rooms in a double-family apartment should reach 4, and the number of unlocked rooms needs to reach a certain level to enhance the prosperity.

2. Average completion rate of unlocking rooms: Players need to unlock rooms, with an average completion rate of 25%.

After these two conditions are met, players can unlock the community prosperity level 6.

Ways to make money quickly: 1, recruit more models or office workers with money in their pockets; 2. Ensure that the guest satisfaction is at least 50%, so that the rent will be increased; 3. Breakfast shops should be opened as soon as possible, and the upgrade and menu update should keep up with the speed.