Chapter 28: I Will Devote Everything to the Crown Prince"No need for gifts."Li Chen said faintly, "Since you took the initiative to meet me, then the things are already prepared"Chapter 915: Xu Changqing's Officialdom Philosophyour command, but the development of gunpowder requires a large number of experiments, and the application for materials is afraid that it cannot avoid the eyes and ears of others..."Li Chen, who had a...