only know ust, hku don't know
1. does not require to get lv3 in Chinese Language in DSE if you apply while non-jupas.
3/4. check this:
http://arr.ust.hk/ust_actoe/index.php
you will be admitted to year 1 but after credit transfer, you are allowed to study year 2 or even year 3 courses, and are eligible to graduate after study 3 years, try to take those courses that are in the database showed in the website so that more credits can be transferred (max.: 30credits )
利申: 2014dse 中文lv2, now study in ust
