From Harbin Station, you can take the 2624 train to Xiongyuecheng Station, and then take a bus or taxi to Bayuquan. The hard seat fare of the 2624 train is 90 yuan, the hard sleeper fare 194 yuan, and the soft sleeper fare is 294 yuan.

Or, from Harbin Station, take K928 train to Wafangdian Station, and then take bus or taxi to Bayuquan. K928 train hard seat fare 1 15 yuan, hard sleeper fare 200 yuan, soft sleeper fare 3 12 yuan.

The above is the cheapest option, but it takes a long time to change trains halfway. If you want to be faster and more convenient, you can choose to take the high-speed train or the bullet train. From Harbin West Railway Station, you can take the G704, G766 and G708 trains directly to Bayuquan Station. The fare is between 340 and 350 yuan, and it takes about 4-5 hours.

In short, according to the above information, you can choose the transportation mode that suits you best.