Over the years, he has traveled throughout Shahe, and made his way to the north, like Baoding city, Hebei, and Beijing, and south to Henan.

He published another book recording the plants he shot over 2014-18, which introduces nearly 800 types of plants on the Taihang Mountains.

According to writer Yang Xianping, who is also from Shahe, "What Liu has done is meaningful. He shows respect for every simple plant, gives other people a chance to know about the plants on these mountains, and honestly records changes in such plants."

Recalling the past years, Liu says: "Persistence is important. Sometimes when you do something, not for economic benefit but pure love, you will gain a sense of fulfillment when you think about all the things you have gone through."