Longchuan Laolong Beef Tendon Cake Factory. Beef tendon cake has become a food suitable for all ages because of its golden color, soft pastry, sweet and delicious taste. This traditional Dongjiang specialty with a history of more than 300 years has long been famous in southern China and is well known to the world. The reporter went deep into Longchuan Laolong beef tendon Cake Factory, explore the history of this century-old brand.