Peter H. Raven is president of the Missouri Botanical Garden and honorary director of Ecological Restoration and Biodiversity Conservation Key Laboratory of CIB, CAS.
Acompanied by professor Yin Kaipu and visiting professor Zhang Libin, Peter H. Raven and his wife were invited to investigate Mount Gongga area for three days in order to understand the effect of global climate warming on biodiversity.

In LengQi town of LuDing county, Peter H. Raven inspected a Gingko tree with 1700 years old. In Hailuogou-eastern slope of Mount Gongga, he investigated vegetation altitude belts of subtropical evergreen broadleaved forest-evergeen and deciduous broadleaved mixed forest-coniferous and broadleaved mixed forest-subalpine coniferous forest and alpine shrub meadow, and also made a special trip to the blue flagstone near NO.2 encampment to see a fantastic aerophyte Polygonatum pendulum belonges to Liliaceae living on the Lithocarpus cleistocarpus, which is discovered and named by professor Liu Zhaoguang and associate professor Hu Xiaohong, later its name is changed to Heteropolygonatum pendulum.

As a leading botanist and advocate of conservation and biodiversity with a notably international outlook, Doctor Peter H. Raven highly affirmed the important status of abundant propagation in Mount Gongga area for the world biodiversity research field. He thought that the landscape-red rock patch-formed by alga and epiphyte compound body pervaded rapidly is a result of global climate warming.

During the journey back to Chengdu, Doctor Peter H. Raven said that Mount GongGa is a very important place, he hoped that Missouri Botanical Garden and CIB will carry on some significative cooperation research projects in this area.