CREATE TABLE table_43857 ("Year" FLOAT, "Men's singles" TEXT, "Women's singles" TEXT, "Men's doubles" TEXT, "Women's doubles" TEXT, "Mixed doubles" TEXT)

Which men's singles has mixed doubles with Chen Hung-Ling Chou Chia-Chi?
SELECT "Men's singles" FROM table_43857 WHERE "Mixed doubles" = 'chen hung-ling chou chia-chi'
SELECT "Men's singles" FROM "table_43857" WHERE "Mixed doubles" = 'chen hung-ling chou chia-chi'