Dim Sum is usually linked with the older tradition of yum cha (tea tasting), which has its roots in travellers on the ancient Silk Road needing a place to rest. Thus teahouses were established along the roadside. Rural farmers, exhausted after working hard in the fields, would also go to teahouses for a relaxing afternoon of tea. At first, it was considered inappropriate to combine tea with food, because people believed it would lead to excessive weight gain. People later discovered that tea can aid in digestion, so teahouse owners began adding various snacks.