[Roger]

For those who live and/or work in the northern NT, there is a translation agency/language school in Shenzhen not too far from the Huanggang Customs (about Y20 by taxi). The boss' name in Zhang Min and her phone number is +86 755 8381 8880. Obviously you get to practise what you learnt in fairly short order if you go over there, and it's probably cheaper than HK.