Why cant make the travel time shorter? As from the news, the nonstop services for the 330km route means only approx 220km/ph. Does not look high speed right. Thought can generally average 300km+?

Haha, I know Thomas too ;P
But actually top speed not 300km, many top speed can go >300, average speed can 250km or faster. But again, it is likely more expensive to run a faster service train, which is not something that we can afford.