In Kuo's eyes, the farm is like a classroom without walls. The "students" not only embrace everything in nature, but learn how to observe the world with their own senses and how to create with their own hands.

Kuo believes just being in nature can provide people with relaxation and refreshment.

"I think everyone has a yearning for nature at a time people are facing heavy work pressure and choosing to spend leisure time with mobile phones. Simply looking nature, looking at what the animals do is also a way of self-healing," Kuo said.

After three years of operations, the Wonder Farm has made its name in Kunshan and nearby cities, creating annual revenue of around 10 million yuan ($1.54 million). Last year it received over 20,000 visitors, and that number is projected to reach 35,000 this year.

In addition to attracting city people to the farm, Kuo has also planned events to bring nature to the city, such as temporary mini-farms in shopping malls, residential communities and schools.

"Through our natural way of planting and experience-oriented activities, we want to make people enjoy and learn about nature and inspire them to adopt a greener lifestyle to better cherish and protect the environment," Kuo said.

Kuo now brings his young daughter to the farm every week, and she loves to participate in activities and even tries to help with his work.

"To see my daughter and the visitors enjoy themselves in the farm is the best reward for me."

Hu Shuchen contributed to the story.