精通
jīng​tōng HSK7

to master

jīng​tōng to master
  1. 精 jīng verb
    proficient
    skilled; conversant; having a thorough knowledge of a subject or craft
  2. 通 tōng adjectiveverb
    to understand
    to understand thoroughly; to master a subject or skill

jīng​tōng to influence by sincerity
  1. 精 jīng nounadjective
    energy
    (bound form) vitality; spirit; drive; physical or mental energy
  2. 通 tōng verbnoun
    to connect
    to connect or communicate; to have social or trade relations with others