Yanoda, in Baoting County, Hainan, is an original tropical rainforest, about 40 minutes drive from Sanya. Compared with the famous scenic spots on the beaches of Sanya, Yanoda is low-key and introverted, but it is one of the few 5A-level scenic spots in Hainan with distinctive features. Yonoda's excursions, the general tourists will go to the rainforest to walk, know a variety of tropical plants, including the rare tree species such as the mysterious Hainan huanghuali and the poisonous trees like blood and throat, others will follow Streams, or high-altitude ziplines, but few people know that there is also a three-way valley in the Yanoda area, an undeveloped rainforest secret. Along the tour of the plank road, the plank road is built along the stream, the water is clear and at a glance. The creek is a scattered boulder. The chaos is self-contained, and the stream passes through these boulders. It is slow or urgent, and no one is disturbed. The original ecological rainforest is also unmodified, and the trunk grows obliquely and slanting. From time to time, there are vines blocking the way. There are many vines in the tropical rain forest. The more common name is called Jianglong's vines are also Chinese herbal medicines. This rainforest is a paradise for animals. Since there are few tourists coming, all kinds of insects are infested. Yanoda is a natural oxygen bar. According to monitoring, the average negative oxygen ion content in the air reaches 30,000 per cubic centimeter, which is several times or even ten times higher than that in the city.