China. (Hong Kong). 1901. Envelope endorsed 'Corps Expeditionnaire de Chine' addressed to France bearing Imperial Chinese Post SG 113, 10c green tied by Tientsin date stamp in blue '2nd May' , routed via the Imperial and British Post Offices Shanghai bearing Hong Kong SG 35, 5c blue (pair) tied by Shanghai date stamp 'May 9' with Paris receiver' 14 Juin' on reverse. Very rare item from the French Detachment in the Boxer Campaign.