According to the JSCA catalogue I.P.O. handstamps were applied in folowing 15 Chinese offices: Chefoo, Chinkiang, Chungking, Foochow, Hangchow, Kiaochow, Kiukiang, Nanking, Newchwang, Ningpo, Peking, Shanghai, Soochow, Tientsin and Wuhu. Collectors interested in IPO tieprints should visit www.phsoch.org - the Postal History Society of China. This group of collectors published a paper on the IPO tieprints in 2001.
 
 

IPO Foochow: Cover with stamps of the Chinese Imperial Post (1, 2 and 5 Fen) and a pair of 10 Sen new Koban, from Fuchau (Foochow) via Shanghai and Yokohama to San Francisco.  Chinese cancel Foochow: 11 May 99  Chinese Killer Foochow  Foochow I.P.O.  Shanghai 14 May 99 (Chinese Post Office)  Shanghai I.J.P.O. Medium Single Circle (2 figure year): 15 May 99  Yokohama Medium Single Circle (2 figure year): 20 May 99 on backside  San Francisco Paid All in black: June 9 1899 on backside

 
 
 

IPO Beijing:  Cover with 10 Fen of the Chinese Imperial Post and a 10 Sen new Koban from Beijing to Osage City, Kansas, via Shanghai, Yokohama and Vancouver.  Beijing I.P.O.  Chinese cancellation Beijing NOV 99 (unclear)  Chinese Shanghai marking: 18 NOV 99  Shanghai I.J.P.O. Medium Single Circle with 2 figure year: 20 NOV 99  Yokohama Medium Single Circle with 2 figure year: 27 NOV 99  Arrival Vancouver: 4 DEC 99  Arrival Osage: Dec 20 1899

 
 
 

IPO Shanghai:  Cover with 10 Fen of the Chinese Imperial Post and a 10 Sen new Koban from Shanghai to Littles Mills, North Carolina, via Yokohama and San Francisco.  Shanghai I.P.O.  Chinese Cancellation Shanghai  Shanghai I.J.P.O. Medium Single Circle with 2 figure year: 11 JUL 99  Yokohama Medium Single Circle with 2 figure year: 17 JUL 99  San Francisco PAID ALL: Aug 3, 1899  Littlesmills arrival mark: Aug. 17 1999

 
 
 

IPO Tientsin: Cover from Tientsin via Shanghai and Yokohama to Ontario, Canada. Stamps: 10 Fen Chinese Imperial Post and 2 off 2 Sen UPU Koban.    Chinese cancellation Tientsin: 30. Jul 99  Tientsin I.P.O. tieprint in black color Shanghai I.J.P.O. Medium Single Circle with 2 figure year: 8 Aug. 99  Yokohama transit marking on back: 15 Aug. 99

 
 

IPO Tientsin: Cover from Tientsin via Shanghai, Yokohama and Vanvouver to Toronto in Canada. Stamps: 10 Fen Chinese Imperial Post and a pair of 5 Sen UPU Kobans from Japan. Chinese cancellation Tientsin: 9 JUL 99 Tientsin I.P.O. tieprint in blue color Shanghai Chinese marking Shanghai I.J.P.O. Medium Single Circle with 2 figure year: 16 JUL 99 Yokohama transit  Vancouver transit Toronto arrival marking: AU 13 99