CREATE TABLE table_66323 ("Producer" TEXT, "Product" TEXT, "Samples taken" FLOAT, "Samples failed" FLOAT, "Melamine content ( mg/kg ) " FLOAT)

What the most samples failed for and had less than 1 samples taken?
SELECT MAX("Samples failed") FROM table_66323 WHERE "Product" = '可淇牌嬰幼兒配方乳粉' AND "Samples taken" < '1'
SELECT MAX("Samples failed") FROM "table_66323" WHERE "Product" = '可淇牌嬰幼兒配方乳粉' AND "Samples taken" < '1'