Revert "Deletion of unnecessary material"
Revert "Deletion of unnecessary material"

This reverts commit e072424bffc91edfea8501a1001c2fcf528b9c3a.

MTR2D2/MTR2D2.github.io,MTR2D2/MTR2D2.github.io,MTR2D2/MTR2D2.github.io,MTR2D2/MTR2D2.github.io