1) That’s not something like mildew but black dots.
2) We have been suffering by this Black dots, causing us getting higher usage than previously calculated.
3) We presume that the black dots were caused by the pigment left into the machine, although it should have been cleaned up before next production,
for which improvement is needed in their future production.
it is not necessary
, it is not necessary to ask any compensation to Yantai, but please inform them as below