CREATE TABLE table_20578 ("Date  ( CE ) " TEXT, "Text" TEXT, "Simplified characters" TEXT, "Traditional characters" TEXT, "Pinyin" TEXT, "Wade-Giles" TEXT, "Literal meaning" TEXT)

Name the date for q ngyu n y m
SELECT "Date (CE)" FROM table_20578 WHERE "Pinyin" = 'qíngyuán … yìmǎ'
SELECT "Date (CE)" FROM "table_20578" WHERE "Pinyin" = 'qíngyuán … yìmǎ'