In today’s increasingly important intellectual property rights, it is necessary to understand the following legal basics.
CC0 is the “no copyright reserved” option in the Creative Commons toolkit – it effectively means relinquishing all copyright and similar rights that you hold in a work and dedicating those rights to the public domain.

About CC0 Protocol
The copyright system stipulates that creators of works have exclusive rights for a period of time, and works that have expired will automatically enter the public domain (PD), becoming a state without exclusive rights holders, and becoming the common intellectual property of mankind. used freely by the public.
Some selfless creators voluntarily give up all rights and interests in their works, hoping that the works will directly enter the public domain where “no rights are reserved”. How can this be declared to the public?

The current internationally accepted practice is to use the copyright license agreement provided by the Creative Commons (Creative Commons). One of the agreements that declares the work to be in the public domain is CC0. A work that adopts the CC0 agreement means that the copyright owner has contributed it to the public domain, and to the extent permitted by law, waives all his worldwide rights to the work based on copyright law, including all related rights and adjacent rights.
It can be understood in this way: texts, pictures, audio, video and other works marked with “CC0” can be copied, modified, distributed and deduced without the consent of the copyright owner and without concern for copyright risks, and even for commercial purposes. Simply put, it can be used at will, including commercial use.