    function getStaticCommissionRatio(uint256 level, uint256 investCycle) private pure returns (uint256 ratio) {
        if (level == 1) {
            if (investCycle == 30) {
                ratio = 7;
            } else if(investCycle == 60) {
                ratio = 8;
            } else {
                ratio = 9;
            }
        } else if (level == 2) {
            if (investCycle == 30) {
                ratio = 8;
            } else if(investCycle == 60) {
                ratio = 9;
            } else {
                ratio = 10;
            }
        } else {
            if (investCycle == 30) {
                ratio = 11;
            } else if(investCycle == 60) {
                ratio = 12;
            } else {
                ratio = 13;
            }
        }
    }