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_33 (density VARCHAR, simplified VARCHAR)

### Question ###
What is the density when simplified shows 南山区?

### Accurate SQL ###

SELECT density FROM table_name_33 WHERE simplified = "南山区"