Joe
Last pic identified as hospital Staff of Feldlazarett 357 in Turkey,September 1917.
Pic was originally posted at: http://www.sammlergemeinschaft-deutscherauszeichnungen.org/
Peter
From ebay.de,seller f-08-15,a few months ago.
Japanese & Germans together Peking 1900/1901.
I think thats Erich von Falkenhayn on right,next to Japanese officer.
Even though the photo studio states processed Shanghai it might be somewhere else,even Tientsin.After the Boxer Rebellion was crushed a lot of patroling continued around Peking as well.Perhaps an allied officer wanted to pose with some Manchu troops?His sleevebands also indicate navy?
I found...
Here's some Imperial Chinese troops 1890s.
Uniforms look similar to those in Joe's photo.
By 1905 Chinese uniforms were more of a European style.
All pics from memoryofchina.org
In 1907 a Chinese Company was added to Shanghai Volunteer Corps.
Another helm photo as well,from:
http://www.traditionsverband.de/download/pdf/MilitaerPolizeiChina.pdf
Wylie,might post there later.Yen on AHF says they are numbers on their vests as well.
Another Ostasiatische Infanterie Regiment pic from: http://www.kopfwelten.org/kp/personen/kessler/
Look to me like the Shanghai Municipal Police:
http://en.wikipedia.org/wiki/Shanghai_Municipal_Police
A very paramilitary type police force.Photos later from 1940 here:
http://bbs.news.163.com/bbs/mil/182634558.html
http://www.smh.com.au/world/diggers-at-play-frozen-in-time-20110226-1b97y.html
73 of the photos can be viewed here: http://au.tv.yahoo.com/sunday-night/galleries/article/-/article/8898586/image/1/lost-diggers/