A.
The right collar is overlapped by the left collar, hidden under the left-front side.
B.
The left collar is overlapped by the right collar, hidden under the right-front side.
C.
When the left lapel and the right lapel of the Hanfu meet before the chest, there forms a smooth curve of collar connection.
D.
When the left lapel and the right lapel of the Hanfu meet before the chest, there form two parallel collars.