Before all the Olyumpics thing, Singapore passport into China, no need VISA IIRC. Multiple entries applies for PR, which I did for my boss. It just means from SIN to China. Not China - China. So one trip to CHINA means SINGLE TRIP.
I did more than 14days a couple of times and hop from city to city. Not sure it has changed though.
Good to check, especially with the messy immigration rules by them.
Even the APEC card dont work now =(
Wah, I think better should go and asked the embassy 1st. So many different experiences on the VISA.