There's no better time than right now to eat these delicious crustaceans. Ye Jun seeks out the capital's tastiest morsels.

Autumn is China's biggest crab season. That's very much because the most popular freshwater crabs are at their delicious peak now - meaty and loaded with roe. Beijing's restaurants and hotels are busy presenting their best crab dishes.

Xie Lao Song, a specialized crab restaurant, is holding its 13th annual Crab Festival. Its secret of success is a special "fragrant and spicy" sauce - the recipe, the restaurant says, is as valuable as Coca-Cola's.