Chinese Maritime Customs project - 中国海关近代史研究项目Building on earlier collaborations with historians at Cambridge University and the Second Historical Archives of China, this 2003-07 AHRC-funded project was designed to further understandings of the modern Chinese state, British imperial history, and the history of modern globalization in China, by focusing on the role the Chinese Maritime Customs Service and its staff played in these historical processes.
From this website, you can find some import and export data-sets and descriptive catalog for archives, etc.