CREATE TABLE table_66321 ("Producer" TEXT, "Product" TEXT, "Samples taken" FLOAT, "Samples failed" FLOAT, "Melamine content ( mg/kg ) " FLOAT)

What's the most melamine content that has more than 1 samples failed and produced by Guangzhou Jinding Dairy Products Factory?
SELECT MAX("Melamine content(mg/kg)") FROM table_66321 WHERE "Producer" = 'guangzhou jinding dairy products factory' AND "Samples failed" > '1'
SELECT MAX("Melamine content(mg/kg)") FROM "table_66321" WHERE "Producer" = 'guangzhou jinding dairy products factory' AND "Samples failed" > '1'