We should drink different kinds of tea all year round. We are sleepy in spring, and drinking some scented tea properly can avoid sleepiness. It's hot in summer, so you should drink some green tea to relieve the heat. You should drink some oolong tea properly in autumn, and you can also drink other teas. In autumn, I don't think it is necessary to drink oolong tea. In winter, I'd better drink some black tea to keep myself warm.
There is no need for the landlord to drink some tea that meets the needs of the whole year, but he can also drink some tea scented tea that he likes: rose tea, red rose tea, jasmine tea and so on.
And green tea: Longjing Biluochun and so on.
Barley tea is mainly produced in the northeast, and most people drink barley tea. Of course, it varies from person to person. Green tea, black tea and Pu 'er all have markets.