踏查

踏查	tà chá	to investigate on the spot
踏	tā	see 踏实
踏	tà	to tread / to stamp / to step on / to press a pedal / to investigate on the spot
查	Zhā	surname Zha
查	chá	to research / to check / to investigate / to examine / to refer to / to look up (e.g. a word in a dictionary)
查	zhā	variant of 楂