Just left a short review (full marathon) here for others who want to run the race next year.
Although in general, the first half of the course is uphill running and the second half is downhill running, there are lots of gentle up and down along the whole course. If you can complete the China Coast Marathon, then you should be able to KO this race.
The route is scenic but not very and you have to run in road tunnels many times.
Food/Drink supply was fair and only limited stations provided food/sport drink.
Transportation arrangement was good. Toilets were enough.