cǎi
to step on
to tread
to stamp
to press a pedal
to pedal (a bike)
cǎi shā chē
to step on the brake
to brake (when driving)
cǎi xiàn
to scout for a tour operator
to reconnoiter a potential tour itinerary
(tennis) to commit a foot fault
cǎi shuǐ
to tread water
to paddle or tramp in shallow water
cǎi dòng
to operate by means of a pedal
pá gāo cǎi dī
crawl high, step low (idiom); unprincipled crawling, flattering one's superiors and trampling on one's juniors
toadying and bullying
jiǎo cǎi liǎng zhī chuán
see 腳踏兩隻船|脚踏两只船[jiao3 ta4 liang3 zhi1 chuan2]
cǎi xiàn tuán
group on a tour to get acquainted with the local situation