Black, no lightpenetration; Used for drum, package and decoration.
黑色，不透光；用于鼓乐器、包装及装饰装潢等。
2
Let Khan micro-lightpenetration clothing, mountain temper their feet in a tree shade down a Shuchui barbecue, and then come home sunset Hengzhe Minor.
让轻汗微透衣衫，让山路磨炼双脚，在一处树阴下来一次野炊烧烤，然后踏着夕阳哼着小调回家。
3
From what I know it's become visible to modern radar (at least enough that it's a liability) and wasn't much use anyway as more than a lightpenetration bomber.