Can the nationality of Lan be changed back?

Immigrants with China nationality can change back, but they must meet the following conditions:

1. According to Article 13 of the Nationality Law, foreigners who used to have China nationality can apply for the restoration of China nationality with justified reasons, and those who are approved to restore China nationality may not retain their foreign nationality;

2. Have certain economic ability and housing conditions.

See Articles 13 and 14 of the Nationality Law of the People's Republic of China for details.