As the instructor, Yang Kong explained, his voice sounded a little gloomy with a strange sense of sadness as if his voice came from a faraway time, "Most of the crops planted here are from the old civilization. They call it the potato. The only crop that is unique to our era is the yellow grain, which took us a few generations to modify from the seeds left behind by the old civilization. Unfortunately, there is almost no increase in nutrition value after the modification. It even took a step backward. Plus, the taste isn't great either, but the production amount was something comforting.
"That's why the old civilization is great, but so what? The era that many admire was destroyed. What they left for us is an era that's constantly changing. The animals changed, the plants changed, and even we humans are changing, and it's not something subtle!