In the face of victory and honor, Hou Debang has no pride. He knows that only continuous innovation can lead to new development. In 1938, due to the Japanese invasion of Tianjin, the Wynn Factory was forced to move to its new location in Wutongqiao, Sichuan. In Wutongqiao, only brine can be used as raw material to make alkali. It must be concentrated and saturated first, which is very costly. The salt conversion rate of the Solvay alkali production method is only 70%. In order to reduce costs and improve salt utilization, a new alkali production process must be found. Finally, they decided to buy the German patent of the Chaan method and use salt to make alkali.