);
            // smooth new infec; 
            let t = 0;
            const originyValue = datum => datum['新增确诊'];
            for(; t < sequential.length; t++){
                sequential[t].forEach(datum => {
                    if(t == 0){
                        datum.newinfec_s = originyValue(datum);
                    }else if(t == 1){
                        datum.newinfec_s = (
                            originyValue(datum) + 
                            originyValue(sequential[t-1].find