CREATE TABLE table_20574 ("Date  ( CE ) " TEXT, "Text" TEXT, "Simplified characters" TEXT, "Traditional characters" TEXT, "Pinyin" TEXT, "Wade-Giles" TEXT, "Literal meaning" TEXT)

Name the pinyin for 657 date
SELECT "Pinyin" FROM table_20574 WHERE "Date (CE)" = '657'
SELECT "Pinyin" FROM "table_20574" WHERE "Date (CE)" = '657'