SELECT MAX(melamine_content_mg_kg_) FROM table_name_48 WHERE producer = "guangzhou jinding dairy products factory" AND samples_failed > 1
Apa konten melamin yang memiliki lebih dari 1 sampel gagal dan diproduksi oleh Guangzhou Jinding Dairy Products Factory?
CREATE TABLE table_name_48 (melamine_content_mg_kg_ INTEGER, producer VARCHAR, samples_failed VARCHAR)