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_name_47 (portfolio_attachment VARCHAR, age_at_appointment VARCHAR, chinese_name VARCHAR)

### Question ###
What is the portfolio attachment of the Undersecretary appointed at age 48 with a Chinese name of 梁鳳儀?

### Accurate SQL ###

SELECT portfolio_attachment FROM table_name_47 WHERE age_at_appointment = 48 AND chinese_name = "梁鳳儀"