Emperor Yuanyou said with a smile, "whoever wants his Hai Dongqing, I just teased for a while, and then my mother turned the corner to remind me not to play with things. Instead of giving these things, I look forward to new progress in the development of firearms on his side.",Chen Tingjian: "there must be something, but there are no clues. It's no use guessing. We'll know about it in an hour or two.",Chen Tingjian doesn't enjoy being busy, but the bigger the official is, the heavier the burden is, so he can only get up early.。