In a simple and austere meeting room at the Red Star Rolling Mill Workers' Hospital, four people in white coats sat behind a row of yellow-painted wooden tables, taking turns asking questions.,The young man, called Li Yuan, flashed a glimmer of excitement in his eyes and bowed respectfully, saying: "Thank you, Director Tang, thank you, teachers.",It can store 404 tons of water, or 210 tons of flour, or 674 tons of rice...。