Pretty normal.

The salary range for E5 fresh grad is dependent on your results.

4.2k is the starting base range. IIRC it was between 4.2k - 5k?

16 days AL is standard.

I advise you to go to other company if they can provide a similar salary because you won't want to have such a slow pace at the start of your career. You will want to learn as much as you can during your 1st year. Of course, if you know how to play the taiji game and prefer to self-learn and upskill yourself, ST is a good place .