YN:can get the topo structure
Yn:can show structure but have no line
Yn:wrong try
Revert "Yn:wrong try"

This reverts commit 51c2e1e9a412eb11a87f69e0ff971ac81b450289.
Yn:wrong try
Revert "Yn:wrong try"

This reverts commit 619f1b593cc372605b03c58949dc9740bf154d03.
YN: can draw , but repeat comes,with error
Yn:complete ---next show the package
Yn:wrong try
Revert "Yn:wrong try"

This reverts commit 468dc80d927bce38608359949a5ec4931ca32efd.
Yn:remove repeat path, can't draw package
Yn:repair a show bug

next:draw package