user: Question: Which Hanzi has a Suburban population in 2004?
Columns: ['Name', 'Hanzi', 'Hanyu Pinyin', 'Population (2004 est.)', 'Area (km²)', 'Density (/km²)']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['City proper', 'City proper', 'City proper', 'City proper', 'City proper', 'City proper']
SQL:

assistant: SELECT "Hanzi" FROM "Table" WHERE "Population (2004 est.)" = 'Suburban';