Ping Yi added $3.6M I'm not sure if this is for the six months (Q1 and Q2) or just Q2, but here's what the 10-Q has to say about the income from the Ping Yi deal (page 9):
As of October 31, 2012, the Company received total payment of $3,575,262 which $3,387,663 as prepayment of raw coal and $187,599 as coal washing facilities service.
If it's for six months, then since the 1Q 10-Q indicated about $825K from raw coal and $44K from coal washing, then it would appear that Ping Yi added roughly $2,563K from raw coal and $144K from coal washing to the Q2 total.
If the report is only showing Q2, then even better.
https://www.sec.gov/Archives/edgar/data/1137083/000113708312000081/llen10q2.htm