跟踪

跟踪	gēn zōng	to follow sb's tracks / to tail / to shadow / tracking
跟	gēn	heel / to follow closely / to go with / (of a woman) to marry sb / with / compared with / to / towards / and (joining two nouns)
踪	zōng	variant of 踪
踪	zōng	(bound form) footprint; trace; tracks