xiāng féng
to meet (by chance)
to come across
píng shuǐ xiāng féng
strangers coming together by chance (idiom)
rén shēng hé chù bù xiāng féng
it's a small world (idiom)
xiá lù xiāng féng
lit. to meet face to face on a narrow path (idiom)
fig. enemies or rivals meet face to face