Sao MaI Viet Service Trading Manufacturer Co., Ltd is a leading manufacturer of 2-layer, 3-layer, 5-layer, 7-layer cardboard packaging,.. serving interior wooden products, food, garment, electricity, etc.Sao MaI Viet Service Trading Manufacturer Co., Ltd is a leading manufacturer of 2-layer, 3-layer, 5-layer, 7-layer cardboard packaging,.. serving interior wooden products, food, garment, electricity, etc.