CREATE TABLE table_35850 ("Name" TEXT, "Hanzi" TEXT, "Hanyu Pinyin" TEXT, "Population  ( 2010-11-01 ) " TEXT, "Area  ( km\\u00b2 ) " TEXT, "Density  ( /km\\u00b2 ) " TEXT)

What is the Pinyin for the item that has a density of 77?
SELECT "Hanyu Pinyin" FROM table_35850 WHERE "Density (/km\u00b2)" = '77'
SELECT "Hanyu Pinyin" FROM "table_35850" WHERE "Density (/km\u00b2)" = '77'