Dam Vac is in the Red River system. Its water is circulated by stream system of Vinh Phuc Province. In the lake complex with high value of tourism, Dam Vac takes an important role. Dam Vac is in the middle of Vinh Yen City having 23 main branches, which created many small lakes and ponds with its circumference of 14 km2.

In the past, at Giao Diet party (normally called as Wrestling Party) at Hoi Hop village (Hop Thinh commune) opened annually from the tenth to the fifteenth of the Lunar New Year; there was a practice of holding a cooking contest between “giap” in communal house. In the dishes of candidate, beside traditional cuisines like minced meat, spring rolls, stew soup and “mọc”, it is required to have Ball Rice Cake.

To have delicious Goi dish, it is needed to prepare seasoning: Soy bean “thinh” (rice thinh possible too), and other spice leaves such as: sung, apricot, fig, guava, polyscias fruticosa (all leaves should be not old), green banana, ginger, pepper with salted shrimp, fresh galangal root, ... Fish are washed, and peeled out fish-tail, then dewatered.

Under the French rule, “Madam Cai Cam Lean Pork Paste and Fermented Pork Roll” only sold in a small zone but it was still well-known to every place; many merchants went to Vinh Yen to buy then brought to Lao Cai or Ha Noi selling. When she transmitted her career to her son-in-law, he moved to Market Street and registered his trade mark as Phu Duc.

From many generations at Three Canh Villiages (nowadays it is called Huong Canh Town) there are 2 traditional dishes but very famous, they are fried gruel and ball rice cake. Their names are simple but unforgetable to who used to taste them.