This is a big museum, and there is something for everyone here.
The museum arrange your walk in archaeological order. Start from hundreds and thousands of years ago, with stones, fossils, then few thousands ago with Chinese, then few hundred years ago when there were interactions between east and west, then the last 200 hundred years.
There are plenty of exhibits, both replicas and originals. They even have small set ups of farms, fishing boats, temples, Chinese opera, etc.
There are videos in small theatres for more complex issues, like opium war. They rotate the videos in English, Mandarin, Cantonese; but you do not have to wait if you don't have the patience, as Chinese versions have English subtitle, and English videos have Chinese subtitle.
I allowed myself half a day for the museum (as there are so many repetitions with museums all around the world), and I regretted it. I am sure that I will allow one whole day when I come next time.