He could fully unleash his imagination and do things he believed would benefit society now.
But he felt he couldn't avoid working on making internal combustion engines, generators, and the like.
When he had the relevant raw materials, like oil, copper ore, insulating varnish, etc., he had to seize the time to carry out research and development.
However, there were none at the moment.
'Er Dan' came back from paragliding.
There were obvious scrapes on his arm, and both knees were bruised.
Ma Lin said nothing.
Youths are naturally fond of playing.
Paragliding is something that fascinates many primitives.
'Er Dan' sat down and began helping Ma Lin polish steel balls.
'Er Dan's skills were still lacking; it might take one or two years to become proficient.
For the past four years, Ma Lin had been polishing stones and wood, making flint spears and arrows, and even trying to carve wood with stones to make simple spinning wheels and other tools, which greatly exercised his hands.
