潜进

潜进	qián jìn	to sneak in / to infiltrate
潜	qián	hidden / secret / latent / to hide / to conceal / to submerge / to dive
进	jìn	to go forward / to advance / to go in / to enter / to put in / to submit / to take in / to admit / (math.) base of a number system / classifier for sections in a building or residential compound