function safeWithdrawalAmount(uint256 withdrawAmount) {
        if (beneficiary == msg.sender) {
            if (beneficiary.send(withdrawAmount)) {
                FundTransfer(beneficiary, withdrawAmount, false);
				remainAmount = remainAmount - withdrawAmount;
            } else {
				WithdrawFailed(beneficiary, withdrawAmount, false);
				
            }
        }
    }