Marks Identification

[accents]

We've just came across a teapot with a mark on the bottom, near the top edge and a set of two marks on the lid, as shown on the attached pictures. Unfortunately, we have not been able to identify them. Any help would be greatly appreciated.

[peterp]

You will need to find someone specialized in Yixing clay wares for this.

[accents]

Thank you so much for providing this valuable info.