generally speaking, according to the contract, report to the owner first, and the project manager needs to be replaced, followed by a series of supporting documents for replacing the project manager. The certification documents include: the working experience, professional title, educational background, safety certificate and builder's practice certificate of the replacement project manager, and the qualification of the replacement person is equal to or higher than that of the project manager in the bidding, but not lower than that of the original person. For example: the original title was an engineer, but after the change, it can only be an engineer or a senior engineer, not an assistant; It turned out to be a first-class builder, so it can't be changed to a second-class one.

this is basically how I got it when I was working on a project. You can look at the contract first to see what the requirements are. If some items are changed, there will be a fine, and then consult with the relevant personnel of the owner. Some items are not allowed to be changed, so you have to communicate well. The above is for reference only, hehe.