For him, teaching is very physically exhausting.
After all, the students are primitive people.
Previously, he had to spend countless effort to attract the attention of the primitive people. Now he can hold their attention, but they are too curious, full of questions, and refuse to end the class if things aren't explained clearly.
Some things are really hard to explain, and some of their questions are too difficult to answer; not even Ma Lin's hometown scholars could answer them.
Mining during the day, teaching at night.
His habit is to keep going until he's utterly exhausted before resting.
He's very pleased with the current atmosphere.
The primitive people around him are open-minded, possess an exploratory spirit, have a thirst for knowledge, and desire to further improve their lives.
Ma Lin feels that their thinking has changed a lot since obtaining steel knives.
