If you want to join the lottery scratch vending machine, you can first understand the relevant joining policies and processes. Specifically, you can consult and apply in the following ways:

1. Contact China Welfare Lottery Distribution Management Center or local welfare lottery sales point directly to find out whether it provides unmanned vending machine joining service and submit corresponding application materials.

2. Find relevant information in official website and apply online. China Welfare Lottery Issuance Management Center and welfare lottery sales organizations in all provinces, autonomous regions and municipalities directly under the Central Government have official websites, where you can find the latest joining policies and processes and apply online.

3. Apply through a third-party platform or agent. At present, there are also many third-party platforms or agents in the market to provide joining services for lottery unmanned vending machines. You can choose appropriate channels for consultation and application.

It should be noted that when choosing the franchise channel, please be sure to carefully verify the qualification and reputation of the other party, and read the contract terms and other relevant documents carefully to avoid economic losses.