This time i have added 2 shuipings made in F1. One is made of black clay sparkled with duanni, sparkles of duanni have a smeared effect, about 120 ml, assigned to shen pu-er.
The other is made of dark qing shui ni, looks very similar to dcq, but the golden sand particles looks finer, about 100 ml, using it for medium roast yancha.
Any ideas about the age and clay quality of the JLZ and the Si ting?

@Pedant Thanks for the link! Will try to soak the pots in vinegar and water, to remove the limescale.