You can learn a lot about the health industry from going on a tour of a medical facility. Check to see if Hai Duong Province Hospital is open to the public while you're in town.
Once you've checked this health care institution in Hai Duong off your to-do list, why not swing by Hai Duong Medical Technical University? It's not far from Hai Duong Province Hospital and is one of this area's best sights.