When you are in Hong Kong you might want to get your Chinese up and running for day-to-day life and for work.
There are various ways of learning Chinese, one of them is from the School of Chinese with its Chinese Language Centre seeks to develop into a world-class centre in teaching Chinese as a foreign language, see here.
Depending on where you are from, contact you consulate and they will tell you what would be the most appropriate for your needs.
For instance if you need to learn French while you are in Hong Kong, you can contact the Alliance Française in Hong Kong:
Alliance Française Hong Kong
1 & 2/F, 123 Hennessy Road
Wanchai, Hong Kong
Tel: (852) 2527 7825
Tel: (852) 2865 3478
Or if you want to learn German, then contact the Goethe Institute in Hong Kong:
14/F Hong Kong Arts Centre
2, Harbour Road, Wanchai
Tel: +852 28020088
Fax: +852 28024363
For English, you always have the British Council, see here.
You may also require info from your work or from your university/institute if you’re studying there!