Many thanks for the advice.
It seems quite troublesome to shift it and also having some risk in loosing some LS. Not sure whether I should do it actually.
My original idea is to take out 50% water, remove most of the LR, leave all fishes in and slowly push the tank. My floor is marble and I believe if just to move a little, it should not cause any problem, but now I need to move quite a lot and still require turning, which actually let me think twice.......
My another concern is whether the cabinet will damage my flooring even though I was told the cabinet was built to allow some movement.
Btw my tank and cabinet is about 2 years old and still in good condition.
Thanks.