Question: What is the 2004 population for 昌黎县?
SQL: SELECT "Population (2004 est.)" FROM "2-164256-2" WHERE "Hanzi" = '昌黎县';

Question: What is the 2004 population for 山海关区?
SQL: SELECT "Population (2004 est.)" FROM "2-164256-2" WHERE "Hanzi" = '山海关区';

Question: Which Hanzi has a Suburban population in 2004?
SQL: SELECT "Hanzi" FROM "2-164256-2" WHERE "Population (2004 est.)" = 'Suburban';

Question: What is the density of 昌黎县?
SQL: SELECT "Density (/km²)" FROM "2-164256-2" WHERE "Hanzi" = '昌黎县';

Question: Which Hanyu Pinyin is labeled Rural?
SQL: SELECT "Hanyu Pinyin" FROM "2-164256-2" WHERE "Name" = 'Rural';