Buying Moutai at the Maotai Cultural Experience Hall of Chengdu East Railway Station generally requires the following steps:

1. Buy a tourist ticket.

2. Visit the Maotai Culture Experience Hall to learn about the history and culture of Moutai.

3. Buy Tian Fei 53-degree Moutai at Maotai Impression Pavilion at the price of 1499 yuan per bottle, and you can buy multiple bottles at the same time.

4. If you want to participate in free wine tasting activities, you can get tickets for the Maotai Cultural Experience Hall and then participate in the on-site tasting of Moutai. The top three winners can also get gifts from Maotai Impression Hall.

The above are the general steps to buy Moutai at the Maotai Cultural Experience Hall of Chengdu East Railway Station, and the specific purchase method may be adjusted according to the actual situation.