No shadow from movable mesh for lightmass bake

Hello,

How can I make a movable mesh to cash shadow in the lightmass baking process?

As the picture shows, the static mesh blocks light coming in from the outside for baking, but the movable doesn’t.

“Force Surface” option does make it block while keepint it movable, but what I want is to keep the mesh movable and use dynamic lighting while it only casts shadow during the lightmass baking process.

Thanks!