All you need to do is apply for copyright registration for the script. A friend of mine wrote a novel and applied for copyright registration. After getting the certificate, he went to a publishing house to publish it. I don’t know how much their cooperation price was. I didn’t ask. I knew that he registered with Shenzhou Blue Shield Intellectual Property Agency Co., Ltd. Blue Shield handled this very efficiently. My friend was in a hurry to do business with the publishing house, so he applied for copyright registration and registration. Urgent, I forgot to ask how much it costs. You can check the Blue Shield copyright registration online and ask the Blue Shield company.