General Administration of Customs of the People's Republic of China (GACC)
GACC official website: http://www.customs.gov.cn/
All schedule auction notices are listed below the public information block. Notices are listed in Chinese, official language of China.
And you can find local customs schedule auction notices at provincial customs webistes. Such like Shenzhen Customs http://shenzhen.customs.gov.cn/publish/portal109/ , Shanghai Customs http://shanghai.customs.gov.cn/publish/portal27/. Chinese Language too.
U.S. Customs and Border Protection (CBP)
CBP official website. https://www.cbp.gov/
You can find US customs' schedule auction in this page. https://help.cbp.gov/app/answers/detail/a_id/265/~...