However, customs declarers have a certificate to enter, so you must take the national unified examination for customs declarers first. This exam is a bit difficult, and the passing rate is only about 10%. If you have no foundation, I suggest you attend systematic and formal training. I don't know which city you are in. If it is Chongqing, I will recommend the training of customs declarers in Chongqing Port -Link. Where do I study with three students in our class? Teacher Zhang really speaks very well, stringing together the chapters and teaching us many easy-to-understand and memorable methods, which is worth listening to.