截长补短

take from the long to supplement the short (idiom) / to offset each other's deficiencies / to complement each other

length / long / forever / always / constantly

chief / head / elder / to grow / to develop / to increase / to enhance

short / brief / to lack / weak point / fault

to repair / to patch / to mend / to make up for / to fill (a vacancy) / to supplement

to cut off (a length) / to stop / to intercept / section / chunk / length