There is a through train from Deyang to Qionglai, which is at 9 am and 3 pm. You can book tickets at the station in advance, and the fare is 43. You can also book tickets at Qionglai Station when you come back. (There is one at 9: a.m. and one at 3: p.m.) If you really can't get tickets, you can suggest buying Wenjiang first and then Qionglai, both of which are high-speed, and the time is about 3 hours, which is still very fast.

After getting off at Qionglai Station, you can immediately take the through train to Tiantai Mountain, and you can get to Tiantai Mountain in about an hour.

I'm not sure about the ticket. The ticket for Tiantai Mountain is 5 yuan (peak season, this National Day is 5 yuan), and November to April is the off-season. The ticket price is 2 yuan. If you want to go to Pingle Ancient Town, you can also get off at Qionglai Station and buy a ticket for Pingle Ancient Town. Play in Pingle ancient town, and then take a bus to Tiantai Mountain. Because Qionglai-Laonanqiao-Wolong-Pingle-Tiantai Mountain is generally taken, you don't have to worry. Tiantai Mountain and Pingle Ancient Town can be said to be on the same route.

then it takes about 2 minutes from Qionglai station to Pingle ancient town.

As for accommodation, I suggest that you start early on the first day, try to get to Pingle at about 1 noon, take a stroll in Pingle in the afternoon, then catch a bus to Tiantai Mountain, and stay on Tiantai Mountain at night. It's better to stay in Moyun Mountain Villa and a small mill. Generally speaking, ordinary farmhouse accommodation is less than 1 yuan a day. So just find a farmhouse to stay in, and the boss may provide you with directions, etc.

Well, the rest is up to you. Have a nice trip!