When can I turn left when driving a car?

pu1. You can only turn left on the green light

2017-11-22

OK

pu2. It's possible when it's a green light, but if there's only a left-turn unprotected place, the road is narrow and there aren't many cars, but both lanes are green, and when cars are running, I start to sweat

2017-11-22

OK