The road to technology

Chapter 29 About the main character's name
(PS: The author read it carefully from the beginning, and found that the surname Dao is indeed a serious schizophrenic, and the word 'Dao' appears too frequently in names and conversations, which may cause some bad feelings, so I decided to change it back to Baijia Last name, the text has been changed one by one, please forgive me if it caused trouble to previous readers!)
(End of this chapter)