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_28138035_13 ( year_location VARCHAR, mens_singles VARCHAR )

### Question ###
When and where did Chen Qi win in men singles?

### Accurate SQL ###

SELECT year_location FROM table_28138035_13 WHERE mens_singles = "Chen Qi"