The temple is one of the biggest in China and if you want to see other parts of the mountains too, plan a few days. It was still an active place of worship when I visited but of course things might be much more touristy now.
Be prepared, too, for some steep staircases, especially if you want to see the lovely roof tiles and ornaments on top of the halls.
Although some parts were in disrepair back then, I loved the atmosphere and relative quiet. If you’ve been to China, you know this is something to appreciate.