The second stage 1978- 1996 with the aggravation of environmental pollution, the concept of environmental protection began to emerge. At that time, environmental protection technology was not developed, let alone environmental protection products.
In the third stage, 1996-2008, marked by the establishment of Huangming Solar, China started the real development of environmental protection technology and the real production of environmental protection products. Since then, in addition to environmentally friendly tableware, green energy (including solar water heaters, photovoltaic products, green dyes, and ecological agriculture) technologies have begun to enter people's lives.
The fourth stage is from 2008 to the present. The Wenchuan earthquake awakened many people. With the opening of the Olympic Games in China, China really began to invest heavily in environmental protection technology.
At this stage, green buildings really appeared.