Hong Kong. (British Post Offices In China). 1918. Registered envelope with circular 'Norwegian/ Shanghai' steamer cachet in violet on face addressed to Norway bearing British Post Office in China SG 2, 2c green (8) and SG 3, 4c carmine tied by oval 'Registered/ Shanghai' date stamp with framed 'R/ Shanghai G.P.O.' with 'Opened by censor/ 1150' censor label and Tonsberg arrival and forwarded to Kristiania. Nice item.