Hi Ryan Yang 3095,
this changeset has created error in the OSM database regarding overlapping ways (blue markers):

https://tools.geofabrik.de/osmi/?view=routing&lon=37.50975&lat=4.31452&zoom=11&baselayer=Geofabrik%20Standard&overlays=duplicated_edges

As you may know, this kind of errors irritate routing software and looks ugly on the masp.
I have reverted it to fix those issues.

If you look closely to the data of this changeset, you can see you have ignored several warning your editor ID has shown you. Please respect this kind of warnings.
Guido