For a pet-friendly hot spring staycation, you'll want to head over to the Beijing Jinyuetai Hotel. The former factory is now an industrial-style hotel, its palette of soft grey and brown features integrating well with its environment. Each room has its own bath, some indoors and some outdoors.
Let the staff know in advance if you do decide to bring along your pets. And once at the hotel, set them free at the hotel's wide, grassy lawn.