Q.weeping cherry tree
Two large egg-shaped, honey-colored, boiled-size lumps situated at 200 cm above ground of tree. What is it and how to treat would be appreciated.

I do think you may be seeing the grafting joints of the Weeping Cherry Tree.
A Weeping Cherry has two parts. The roots and the trunk, the rootstock is actually a fast growing wild Cherry that has been trained into a single straight trunk.
The weeping part or top part is either a white or pink Weeping Cherry and it is grafted onto the trunk. The two parts are grafted together at approx.
5 feet from the ground.
This graft point creates a graft scar.
I believe this is what you are describing.
Here is a link with care information.
https://www.gardeningknowhow.com/ornamental/trees/weeping-cherry/weeping-cherry-growing-tips.htm
https://www.gardeningknowhow.com/ornamental/trees/weeping-cherry/pruning-weeping-cherry.htm
https://www.gardeningknowhow.com/ornamental/trees/weeping-cherry/cherry-tree-no-longer-weeps.htm