Ladies and gentlemen,
This part of davidfeng.com is currently closed, as it is being redeveloped. By September 2016, you should see a brand-new site in English, Chinese, German, French, Italian, and Rumantsch Grischun. A new content layout system will also be used.
Some parts of this new site should be up by August 2015. Apologies if this inconveniences your visit in any way. Thank you for your understanding.