CREATE TABLE table_71935 ("City" TEXT, "Hanzi" TEXT, "Hanyu Pinyin" TEXT, "Regional Population ( 2010 ) " TEXT, "GDP ( 2011 )  ( billion yuan ) " FLOAT)

Which Hanyu Pinyin has a GDP in 2011 larger than 688.02 billion yuan and a regional population of 8,700,400 in 2010?
SELECT "Hanyu Pinyin" FROM table_71935 WHERE "GDP(2011)(billion yuan)" > '688.02' AND "Regional Population(2010)" = '8,700,400'
SELECT "Hanyu Pinyin" FROM "table_71935" WHERE "GDP(2011)(billion yuan)" > '688.02' AND "Regional Population(2010)" = '8,700,400'