帮助与支持

查询海关编码：

https://www.hscode.net/IntegrateQueries/QueryYS

https://hts.usitc.gov/

https://www.trade-tariff.service.gov.uk/trade-tariff/headings/8525?day=21&month=2&year=2018

包裹查询：
https://www.17track.net/zh-cn

燃油费率查询：

DHL
https://www.cn.dhl.com/zh/express/shipping/shipping_advice/express_fuel_surcharge_apem.html

UPS
https://www.ups.com/cn/zh/shipping/surcharges/fuel-surcharges.page