For instance, there's a poem in there which is supposed to be by Emperor Qianlong, but in fact it's by me. I can write a seven-character-per-line poem which obeys all the metrical rules, so that when others read it they think it was written in ancient times.
比如裡面有一首乾隆的詩，就是我編的，我可以寫出一首格律工工整整的七言律詩，別人看到，都以為是古人寫的。