Opponent list will reset every 10 minutes. Between minute 0 to 4, the list might switch back and forth between old and new list. Once it hits minute 4 (e.g. :04, :14, :24,...), the list will change to the new one for the remainder of the 10 minutes. 敌人列表将每10分钟更新一次，在第0-4分钟时，敌人列表可能会在新旧列表之间变化。当到第4分钟时，敌人名单将会在接下来的10分钟内固定为新名单。
=== Special Rules ===
