工于心计

scheming / calculating

heart / mind / intention / center / core / CL:顆|颗[ke1],個|个[ge4]

to go / to take / sentence-final interrogative particle / variant of 於|于[yu2]

(of time or place) in; at; on / (indicating any indirect relation) to; toward; vis-à-vis; with regard to; for / (indicating a source) from; out of / (used in comparison) than / (used in the passive voice) by

work / worker / skill / profession / trade / craft / labor

surname Ji

to calculate / to compute / to count / to regard as important / to plan / ruse / meter / gauge

scheming / shrewdness