Identification mark

[rgomes10]

Hello!
This mark is a mistery to me. Can someone solve it, please?
Thank you so much.
Regina

[peterp]

Are you sure that the blue color is this bright?

This looks like something made at Dehua kiln, including the handwritten two character mark, but the blue color should be different.

[rgomes10]

Yes, it?s this colour. Thank you. And what about the mark?
Many thanks,
Regina

[peterp]

One character, the other not legible for me. There are normally handwritten two-character marks on Dehua items.