Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_25183 ( "Romanised name" text, "Chinese name" text, "age at appointment" real, "Portfolio" text, "Prior occupation" text )

### Question ###
How old was the official with Chinese name ?

### Accurate SQL ###

SELECT "age at appointment" FROM table_25183 WHERE "Chinese name" = '孫明揚'