I would be tempted to use a discount factor somewhere between 20-30% for SIAF considering various factors (China, corporate governance, limited access to financing, trading on a crappy list etc)
Duh, are you suggesting that the Zhongshan government doesn't have the cash? :-)
I know of a Fortune-100 that used a 18% project CF discount factor for Argentina a couple of years ago
Do you know over how long of a time period?
The problem with using a single discount figure over a double digit time period is that the ending years basically have no value. Using a 30% discount factor basically makes a $5.9B income stream worth less than $1B.