The reason why we put the wedding on the 4th finger...?

Why don't we just put the wedding ring on any fingers we want??or why dont we just pierce it anywhere on our body, so we don't have to worry losing it..OR...WHY THE HACK DO WE NEED THE WEDDING RING IN THE FIRST PLACE?!!hahaha..

whatever questions wandering through to your mind, i believe there are answers behind every inquiries..but i'm going to show you the video of why people tend to put wedding ring on their 4th finger..This is based on Chinese tradition and the explanation is given in the video..you decide the rationality of the video..ENJOY~..