| Origin guarantee:

Rox has two production bases in Shanghai and Yuhuan Zhejiang, and another 33333.33㎡ new production base is expected to be fully put into use no later than 2023.

| Capacity guarantee:

The two production bases can provide insulation parts with a production capacity of 2.5 million pieces/year, which is actually 1.5 million pieces/year, and there is still 40% capacity surplus.