He moved the second stone aside and found a few stone slices of suitable thickness from the wedge stone pile, placing them in the low spots, then put the main wall stone back on.
After repeated additions and adjustments, the top surfaces of the two main wall stones finally achieved a roughly level state.
This process required immense patience, as he continuously used large stones as the main structure, with smaller stones as supports, creating a level plane on the uneven ground.
He patiently worked on the construction of this first layer along the three sides of the pit.
Where it was low, he used larger stones or added several wedge stones; where it was high, he dug out some soil.
His sole goal was to have all the tops of the stones form a solid, stable, and roughly level "U"-shaped ring once the first layer was completed.
When the most challenging and tedious first layer was finally completed, it was already past three in the afternoon.
