function withdrawToTeamStep1(uint256 _amount) public onlyOwner {
        
        require(block.timestamp >= TIMESTAMP_OF_20190201000001);
        require(transfer(ownerWallet, _amount));
        emit TransferLog(owner, ownerWallet, bytes32("withdrawToTeamStep1"), _amount);
        totalTeamReleased1 = totalTeamReleased1.add(_amount);
    }