... also foreign ones thanks to Japanese, Chinese and Western trading boats that passed by In the 18 th and 19 th centuries, due to restricting foreign trade policy of Trinh, Nguyen dynasties, it was difficult... themselves Bat Trang’s pottery products were exported to foreign markets during the 18 th and 19 th centuries Its location beside the Red River has provided an enormous source of fine clay... delicacy that is made only in autumn and loved by all Vietnamese 10 It is famous for making "banh chung", a typical square, sticky rice cake for the Lunar