"The courtyard house I lived in was demolished[拆] in 2002, and everybody moved into apartment buildings," he recalls. "Neighbors can never be close like before."
So he moved to the suburbs and his land started to produce after three years.
"I want to live close to nature in a courtyard house with trees," the 50-year-old says. "That's what I call life."
Chang, who is a staff member of the NGO Green Ground Union, says modernization comes with drawbacks.
"Industrial agriculture will drive small farmers out of the production chain," she says. "China is walking the path the United States took, but the ramifications[衍生物] will be worse here."
The event also feature lectures on food safety and sustainable living that deal with such topics as garbage classification.
"We hope to turn this fair into a green lifestyle event," she says.