Berry Chu became interested in orchids back in 1991, when he came across them at the Dawn Markets. Since then, he began looking for wild orchids while hiking, making observations through photographs. He even began to learn how to grow orchids. A decade later, he joined the Hong Kong Orchid Art Association (HKOAA), and became President of the association in 2006.

Wild orchids in Hong Kong are becoming less common by the day. In addition to illegal flower picking, wild orchid seeds are also extremely susceptible to bacteria, with a slim germination rate ranging from 0.1% to 0.01%. Determined to conserve wild orchids, Berry learnt to propagate orchids using an aseptic reproduction method, which increases the germination percentage to nearly 100%. In 2016, he held workshops on aseptic reproduction at school with Snake-tongue Orchid, a species native to Hong Kong. In 2018, he decided to fly to Taiwan to learn about another orchid propagation method. Through artificial cultivation, he hopes to promote a wider variety of orchids in the horticultural market, and encourage the public to preserve ecology through the rightful acquisition of flowers.

Hong Kong has very few books on orchids published in Chinese; Hong Kong Orchids by Gloria Barretto, JL Youngsaye and Tse Shing-chi, former Consultant of HKOAA, was the only one. Taking up writing upon retirement, Berry published a book on Hong Kong’s wild orchids (香港野外賞蘭札記), which features a total of 134 orchid species. Sadly, awareness about botanical conservation among local communities still needs work, especially with mass visitations driven by today's social media culture. To avoid potential illegal picking or the exploitation of wildlife, many points of observation for orchids in his book are kept private.