For making flat
The simplest way is
Flat land by stacking reinforced soil
Make it cost-effective
But
If moisture comes out like this
Dangerous
No matter how cheap it is
Better to turn your head
Water soaks in
The temperature is damaged in winter
Damp again
The land subsides
The water is smeared through the gap
If time is added to that process
? It is water that causes the reinforced soil retaining wall to collapse.
Water is a cleaner, and facilities that are not acclimatized are cleaned up by water sweeping.
Power is nothing without Control!