China. (Indo Chinese Post Offices in Hoihow). 1907. Registered envelope addressed to France bearing Hoihow SG 39, 25c blue and SG 42, 40c grey/ black tied by Hoi-Hao-Chine double ring '17th July 07' with framed hand-struck 'R' routed via Saigon-Central '25th Juil' with Paris arrival on reverse '21/8' . Very scarce registered cover from Hoihow.