Is there any official way to translate Chinese names into English?
Since my comments were getting long, I will reproduce them here. This probably isn't a complete answer though.

It really depends. While names like Wen Jiabao are commonly kept in "Eastern" naming order, names used among personal interactions with "small fry" are sometimes used in the Western order, particularly in a Western context - for instance, in an international school in Asia, 张小明 would probably be referred to (in English, I mean) as Xiaoming Zhang (and probably without the tones and possibly incorrect pronunciation, if it's spoken, depending on the speaker).

But in other places (e.g. the BBC, Le Monde, official usage by places that already use Chinese (e.g. Hong Kong, China)) the Eastern order seems to be kept.

I'm not very familiar with translated novels and the such, but here's what I know:


Names translated from "Western" order are generally transliterated and kept in Western order.
With names translated from Chinese (or written in English but about China/Chinese), from the examples I looked at so far, Chinese naming order is kept. (I looked at: Red Scarf Girl; Lust, Caution; The Good Earth; and The Fat Years.) So at the very least, keeping Chinese names in Chinese order doesn't seem to be uncommon. (Does this feel as unnatural? It really depends. To me, even as a native English speaker, it feels more awkward to have the name order Westernised.)
Strangely enough, Westernisation of the order of Japanese names is a lot more common. For instance, even the BBC refers to 安倍晋三 as Shinzō Abe and not as Abe Shinzō, and (at the very least) a number of anime subtitles (for anime set in Japan) also seem to Westernise the name order. Meanwhile, Korean names seem to be more likely to be treated like Chinese names in terms of whether or not the name is Westernised.