擅长

擅长	shàn cháng	to be good at; to be expert in
擅	shàn	without authority / to usurp / to arrogate to oneself / to monopolize / expert in / to be good at
长	cháng	long / (bound form) length / (bound form) strong point; forte / (bound form) to be good at / (literary) surplus; spare (Taiwan pr. [zhang4])
长	zhǎng	chief / head / elder / to grow / to develop / to increase / to enhance