Online booking, is it possible to book a hotel in a few months at this month's price?

It's hard to say. Hotel prices fluctuate from Monday to Sunday, which varies greatly according to monthly passenger flow or in-store activities, as well as rooms with the same price. Maybe the room booked in April is at this price, and the room with the same price in June will be the same as it is now, but there will be differences (of course, the difference will not be great, such as double beds and single beds, and some hotels will be around 100).