Database: world_1 (difficulty: simple)
Question: Return the different names of cities that are in Asia and for which Mandarin Chinese is the official language.
SQL: SELECT DISTINCT T3.Name FROM country AS T1 JOIN countrylanguage AS T2 ON T1.Code  =  T2.CountryCode JOIN city AS T3 ON T1.Code  =  T3.CountryCode WHERE T2.IsOfficial  =  'T' AND T2.Language  =  'Mandarin Chinese' AND T1.Continent  =  "Asia"