This request is based upon the Supplementary Agreement of the contract No. : TH-PTP.NS-OT-1306/0028+1 Item 5: Performance Bond that STC will provide to "Contractor an additional performance bond or cashier cheque from the recognition first class bank in Thailand." With phone and inperson meetings, consultation and advices from Mr. Xia Xin, and CPP Financial Control Department Administrator within the last two months, it was agree upon that STC will replace the cashier check No 0318690 with the above Bank Guarantee.