Whoever bitchen is, he appears to be a scammer:
http://bitcoin-otc.com/viewratingdetail.php?nick=bitchenuser feedback:
I bought MP. Days later account locked. Appears to have scammed others with MP
Scammer, attempted to dispute a moneypak and/or used a stolen one
Note: sgitcoin != sgbitcoin (so the Zhou Tong - BitChen connection is not clear at all imho). Also Zhou has not been hiding the fact he owns sgitcoin.com:
I still have an operating business in Singapore (
http://www.sgitcoin.com/) and this service is actually quite popular (top Google result for "buy bitcoin in singapore"). Therefore I regularly deal with foreign exchange, money transfers and e-currencies.