The price of tea is, naturally, related to the quality of the leaves - which is highly related to factors such as origin and vintage, and whether they've been properly stored. For aged teas such as pu'er, the older it is, the more it costs. But it's more than just the pricing that helps you choose good tea leaves. Vincent Chu Ying-wah, owner of Moon Garden Tea House, says colour, scent, taste and shape are the four main areas to look at when choosing leaves. 'High-quality tea leaves should look shiny because of the presence of tea oil,' he says. 'And top grade tea leaves have a nice fragrance even when they are dry. 'Tea doesn't taste bitter and should have some fruity and smooth taste,' he says. 'And for shape, for example, longjing is flat, whereas bi luo chun is curly. Don't buy leaves that are smashed into smaller pieces.'