Square bamboo shoots are pure natural health food, the king of bamboo shoots, unique to China. Chimonobambusa bambusa mainly grows in plateau mountainous areas with an altitude of 1400 m to 2500 m. It is square and angular, and its bamboo shoots do not appear in spring, but flourish in autumn. It is a rare thing that grows by absorbing the aura of nature. At present, it is only known to be produced in Jinfo Mountain in Nanchuan City, Chongqing and Qingba Mountain and Bai Zhishan in Tongzi County, Guizhou Province. In recent years, Tongzi County regards Phyllostachys pubescens as a pillar industry to increase farmers' income and get rich in high altitude areas. By artificially producing bamboo and transforming the original bamboo forest, the pattern of "bamboo in the mountains and bamboo shoots in all seasons" has been formed. Bambusa bambusa is distributed in Xishi, Huang Lian, Chumi and Yelang 19 townships in this county, with a total area of more than 300,000 mu, accounting for more than 60% of the total area of similar bamboos in China. Starting from 2005, Tongzi plans to build a bamboo industrial base with a total area of 600,000 mu, mainly Chimonobambusa bambusa, in five years, and realize the goal of bamboo industrial output value of 2 1 100 million yuan. In the past two years, the bamboo industry has developed rapidly through scientific planning and careful management. The total area of bamboo shoots in the county has reached 450,000 mu, which has become one of the four major industries of "bamboo shoots, vegetables, animal husbandry and flue-cured tobacco" and promoted the strong economic development of the county.

Bamboo species in Jinfo Mountain in Nanchuan, Chongqing mainly grow in Jinfo Mountain area at an altitude of 1, 400 meters to 2000 meters. Its shape is square and angular, and its bamboo shoots do not appear in spring, but flourish in autumn. It is a rare thing that grows by absorbing the aura of nature. So far, it is only known to be produced in Jinfo Mountain, a national nature reserve in Nanchuan District, Chongqing.

Li Shizhen's Compendium of Materia Medica in the Ming Dynasty recorded that "bamboo shoots are square and thick, hard and crisp, which can prolong life by being stored specially and eaten regularly". Modern green food scientific research departments have detected that the content of protein in bamboo shoots is 12%, fat is 0.4%, crude fiber is 8%, and it is also rich in amino acids, calcium, iron, selenium, zinc and vitamins B 1, B2, C, etc. Eating food contributes to gastrointestinal peristalsis, promotes digestion, and achieves special effects of losing weight, beautifying and preventing gastrointestinal and cardiovascular diseases. In addition, bamboo shoots are tender in meat, delicious in taste and fresh in color, and come from pollution-free mountainous areas. They were called delicacies and tributes in ancient times, and today they are called delicacies, which are praised by people all over the world.