If he's not planning on coming home during the stretch, make sure he brings enough condoms for the period, and then some extra to make sure. Also, deodorant as the local stuff is not good, and to plan ahead by looking at sites like Alibaba etc to make sure he can get domestic products / medical stuff imported easily, rather than having to pay shipping from the UK to China. Also if he hasn't already figured things out, maybe look into a paying for a no-logs VPN and considering which social/news sites he'll be blocked from using without one under the fascist regime over there. A decent book on current laws/regulations would be handy to get a working knowledge as China is not known for being light on foreign citizens. Edit: Oh and there's a fair few ex/current Chinese residents who post on f*ckedgaijin.com he'll have to tread lightly when asking as its a rather niche forum with a tight user base.