The main religion practiced by the locals is the pre-Buddhism Bon or Benbo-Sec religion. It was introduced to the Aba Prefecture in the 2nd century B.C. It was integrated with primitive local wizardry into the Benbo Sec and became dominant in the 6th Century. In the 7th century, Tibetan Buddhism was introduced to the region. Although through numerous conflicts Buddhism did become prevalent, the Benbo Sec religion has survived and developed, and is now recognised as one of the five sects of Tibetan Buddhism while maintaining unique religious cultural features. There are over 60 Benbo monasteries in the Aba Tibetan and Qiang Autonomous Prefecture.
The Benbo and Tibetan Buddhists worship and make sacrifices to natural Gods. Stupas and prayer wheels (hollow cylinders that contain religious scriptures) can be seen throughout the park, evidence of the local belief that the soul is inherent in all things, including mountains. Prayer wheels come in different sizes and some are turned by hand and others turned by flowing water. One rotation of a prayer wheel equals 100 recitations of religious chants.
Longda can be pieces of cloth (many small pieces of cloth connected by string) or paper with scriptures written on them. The paper longda are thrown in the air, while the cloth ones flutter in the wind or by rivers. The idea of both the longda and the longer guoda is that the wind or water will set the prayers free.
Religious banners or “guoda” in local Tibetan, for different purposes, vary in length from a few to dozens of metres. These are blue, white, red, green and yellow each representing the sky, clouds, life, the natural world (plants, trees, grass) and soil according the five element theory. It is said that families of service men in the Tufan Period (617-907 AD) hung them as army banners on their gates to honour the family. Later these army banners became to bear religious implications and prayer scriptures were written on them. These religious banners are common in the Amdo Tibetan regions and represent an integral combination of the five-element theory and, a proud representation of Tibetan Buddhism.