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)