Why the wedding ring is worn on the fourth finger not Valentine ring

The Chinese give a beautiful explanation to this. The thumb
represents your parents. The index finger represents your siblings.
The middle finger represents yourself. The ring finger represents
your life partner.
The little finger/pinky represents your children. Join your middle
fingers back-to-back, and the remaining fingers tip-to-tip. Now, try
to separate your thumbs.
They will separate because your parents are not destined to live
with you forever. Rejoin your thumbs and separate your index
fingers.
They will separate because your siblings will have their own
families and lead their own lives.Rejoin your index fingers and
separate your little fingers/pinkies. They will separate because
your children will grow up, get married, and settle down.
Rejoin your little fingers/pinkies and try to separate your ring
finger. They will not be able to separate because your life partner
is meant to be with you throughout your entire life, through thick
and thin. #kindnificient