Hey, Veggie. If you have an android phone or google translate you can use your camera. If you open your camera app and hit the google lens icon there is an option for translate.
I tried several different languages from auto to chinese simplified versus traditional and got the following results. Some of the characters were not readable as they a pretty faint in the pics but you may have better luck directly on the flywheel. Maybe some sharpie contrast would help as well.
In picture #2 which are the markings you have labeled (1) the first character to the outside of the flywheel is unreadable. The middle character is "gas" and the right hand character is "close". When I could get them to focus together it translates to "gas off". It also translated to "please shut up" which I didn't find helpful.
In picture #3 which you have labeled (2) the first character is unreadable and the middle character does not come up in translate. The right hand character is "point". When I could get the middle and right characters to focus together it translates to "on time".
In picture #4 which you have labeled (3) the top line of symbols the left character does not come up in translate but the right character is "oil". When I could get both to focus it came up as "oil supply". It also translated to "get angry", which I was starting to. On the bottom set of characters, the left character was unreadable. The middle character is "air" and the right character is "open". When focused together it translates to "intake open".
So, my guess would be (1) is exhaust valve closed, (2) is top dead center, (3) top row is injection point or maybe combustion point, and (3) bottom is intake valve open.
Lemme know how it goes.