After entering the summer, After entering the summer, the sales of our emergency ventilator and transport ventilator have been increasing. The express companies that do business with us have good services. Every time we deliver goods, the deliverymen come to the site to carry them in person. They  don't need our help. But in such hot weather, their clothes were soaked with sweat after each handling. In their own words, they hope that the more goods we send, the better, so that their business can flourish. But on such a hot day, they don't want to send too many goods. It's too hot to bear. They are very tangled and don't know how to balance. However, the sales of our ventilators are still in full swing, so the deliverymen are both distressed and happy.