Can the copyright of photographic works be agreed?

Yes, the agreement takes precedence over the law. When we are in copyright registration, we can make an agreement with others. Usually, the agreement is higher than the law. When concluding an agreement, we should respect the wishes of the parties concerned and conclude the agreement without violating national laws and regulations or harming the interests of others. Article 13 of the Copyright Law of People's Republic of China (PRC), the copyright of a work created jointly by two or more persons shall be shared by the co-authors. People who don't participate in the creation can't be co-authors. Where a cooperative work can be used alone, the authors may enjoy the copyright of their respective parts, but the exercise of copyright shall not infringe upon the copyright of the cooperative work as a whole.