Neighbours, with a capital N, is not just the plural of neighbour. It is the name of a very famous Australian television soap opera about the people who live on a made-up street called Ramsay Street in the city of Melbourne. It ran for decades and was hugely popular on British television; for a long time British viewers grew up with it in the afternoon or early evening. The tone is everyday and emotional — love, rows, secrets, and people popping in next door — which is why the title fits. In Taiwan almost nobody watched it, so you may never have heard of it; in Britain and Australia, people of a certain age will know the theme tune and the street at once. Write it with a capital letter. It is a proper name, not a description.