Bonsai pot, planter, Chinese pot, foliage plant, wild grass, rectangular vermilion clay pot, Yixing, China, with signature

This is a rectangular red clay pot from Yixing, China.
It has a maker's mark.

Dimensions (cm): 21.5 x 14 x 5
Please allow for slight variations.

The grain of the clay is excellent.

There are no particularly noticeable scratches, stains, or chips,
and the condition is good.

Please judge from the photos and consider it. Thank you.