Knowledge sharing (knowledge * * *) is called CC protocol material. The creator voluntarily gives up part of the rights of the work, but there are still restrictions, such as requiring the source and author's name to be marked. Please read the instructions when you see the CC protocol. The PD agreement proves that the work has been donated to the public domain.

CC0 agreement means that the creator voluntarily gives up all the rights of the work and can use it unconditionally, including commercial use. (But it is not allowed to upload to other material websites, claim copyright, or use it illegally. The content involved in the image may still involve trademark rights, public interests and privacy rights.

Photos of people, landscapes, animals, etc.

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Flaticon is a complete icon.

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Icon ninja icon

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Covers all kinds of high-definition video materials.

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Undraw character scene illustration

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Drawkit character scene

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