CREATE TABLE table_203_363 (id DECIMAL, "city\ 2010 census" TEXT, "chinese" TEXT, "built-up area" DECIMAL, "urban area" DECIMAL, "level" TEXT, "administrative area" DECIMAL, "province-level division" TEXT, "remarks" TEXT)

of beijing and shanghai , which city has the largest number of people ?
SELECT "city\n2010 census" FROM table_203_363 WHERE "city\n2010 census" IN ('beijing', 'shanghai') ORDER BY "built-up area" DESC LIMIT 1
SELECT "city\n2010 census" FROM "table_203_363" WHERE "city\n2010 census" IN ('beijing', 'shanghai') ORDER BY "built-up area" DESC NULLS LAST LIMIT 1