There are many ways to realize private communities. Here are some common ways to achieve it:

1. product-oriented: directly product-oriented, the community attracts more users to enter the community by constantly updating products, thus increasing product sales.

2. Membership: Earn income by charging membership fees, such as some knowledge payment platforms.

3. E-commerce: Earn profits by selling goods in communities, such as Pinduoduo.

4. Project-oriented: gain income by promoting certain projects in the community, such as some investment and financial platforms.

5. Crowdfunding: Earn revenue by launching crowdfunding in the community, such as some charities.