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_2263674_1 ( age_at_appointment VARCHAR, chinese_name VARCHAR )

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

### Accurate SQL ###

SELECT age_at_appointment FROM table_2263674_1 WHERE chinese_name = "孫明揚"