This Broken System Allows Me to Farm in a World of High Demons

Qi Chen, a doctor of agriculture, only wants to farm and talk less after traveling through time. As a result, he kept planting - he grew the best food in the continent, the demons came to him to ask him to teach him how to farm, the princess stayed in his house and the nobles all lost their jobs collectively due to his cultivation. Later, everyone was asking: What is the origin of that silent farmer? Qi Chen squatted in the ground without raising his head: "Don't make any noise, the wheat will be harvested soon."