Cold level 26 or above can be a copy. As a new large-scale online game, players can challenge different copies while playing the main story, constantly challenge the powerful copy map and get more rewards and special props, and the copy of the game is generally more difficult than the story game. The minimum copy level is 26. In the reverse replication graph, many of them have random or regular trigger changes. Primary copies often have the opportunity to trigger the chamber of secrets and get a lot of rewards, while intermediate and advanced copies often open two or so maps alternately.