    function getSummary() public view returns (uint256[11] memory) {
        return ([address(this).balance, totalInvestCount, totalInvestAmount,
                 totalStaticCommissionWithdrawAmount,
                 totalDynamicCommissionWithdrawAmount,
                 totalWithdrawAmount,
                 totalUserCount,
                 engineerFunds, engineerWithdrawAmount,
                 operatorFunds, operatorWithdrawAmount]);
    }