China. (Hong Kong). 1898. Envelope addressed to the United States bearing Imperial Chinese Post SG 101, 10c green tied by 'Pa Kua' obliterator with Tientsin (erased) customs date stamp 'May 4th' , routed via Shanghai bearing Hong Kong SG 35, 5c blue (pair) tied by Shanghai transit 'May 9' with Kobe and Yokohama/ Japan '20th May' on reverse, San Francisco/ Paid All 'June 7th' and Philadelphia arrival. Nice item of Customs mail.