From October 19, 2018 Azur Lane (碧蓝航线) Chinese Server requires CN ID.
Full post about ID changes from Weibo
Dear Commander, Dear!
In order to comply with the requirements of the Ministry of Culture's "Interim Measures for Online Game Management", "Azur Lane" will open the real-name authentication login mechanism at 11:00 on October 19th. When you log in to the game, you need to fill in a valid name and ID number to enter the game. We sincerely thank you for your trust and active cooperation with the commanders.
1) Your identity information is limited to real-name authentication for game logins. We will not use this information for any other purpose and promise to keep it strictly confidential and will not disclose it to third parties.
2) An account that has not been authenticated with real name will not be able to log in to the game after the real name authentication is turned on.
3) The same bilibili account only needs to complete a valid real-name authentication after the game is started, you can use the same account to log in to other games.
4) Real-name information can only be submitted once and cannot be modified. Please fill it out carefully.
5) Overseas users and commanders with other questions can visit our website to contact our customer service: kf.biligame.com
How to get Chinese ID
In order to get ID write in google - 'Chinese id generator'.
Guide will be updated on October 19.