How to pronounce 沿線 in Cantonese (2 out of 5):

會自動介紹沿線景點
It'll automatically show you the sights along the way.

Cantonese Sentence Breakdown

wui6
a moment (Taiwan pr. for this sense is [huǐ])
metropolitan
gatherings union
to meet
to catch up
自動 zi6 dung6
automatic
介紹 gaai3 siu6
introduce
沿線 jyun4 sin3
along the line
景點 ging2 dim2
attraction