Do you want to get out of the doorway under the cage or do you want to breed on your back? Did some parrots in the cage see him feeding her food mouth to mouth? Are you an adult? Please ask again if you don't understand the link behind.
Reference for budgerigar breeding: zhidao.baidu.com/question/174615375794596099.html? Oldq= 1 (the URL is copied to the address bar) is text in picture format. If you can't see it on your mobile phone, please use the computer to surf the Internet.