Some programs are closed, and some processes will continue to occupy memory. Open the phone's main menu, select Settings > Applications, you can see all the currently opened applications and background services, and close unnecessary processes according to your own needs.

Install third-party tools to achieve one-click cleaning. There are many such third-party tools, such as Tencent Mobile Manager and Baidu Guardian. Start the corresponding third-party tools, and you will see the "mobile phone acceleration" function. Click Accelerate, and the software will automatically close unused programs and release more memory.

Composition and Cooperation Mode of Cloud Payment Industry Chain in China;

The regulatory layer of the cloud payment industry chain includes the Ministry of Industry and Information Technology, People's Bank of China, China Banking Regulatory Commission, UnionPay and other institutions, which are responsible for formulating financial policies and industry standards, thus ensuring the stable operation of the industry chain.

Cloud payment services include value-added service providers, core cloud payment operators (banks, third-party payment operators and other financial institutions), cloud payment solution providers (such as equipment and system manufacturers), communication operators (technical data communication services), merchants \ public users, etc.