By Osmond Chia

Copyright bbc

The firm said that it will work with an external agency to assess the project’s impact, adding that it had used entirely biodegradable materials. Arc’teryx also said that the spectacle was aimed at raising awareness of mountain culture.

Founded in 1989, Arc’teryx is hugely popular for its high-end sportswear and mountaineering gear and runs more than 150 shops globally. It is owned by Hong Kong-listed fitness equipment company Anta Sports.

It partnered with pyrotechnics artist Cai to stage the high-altitude day-time display called Rising Dragon, set at over 5,000 meters in Tibet’s Shigatse region, a gateway to Himalayan peaks like Everest.

The mountains are also sacred to people in Tibet, where many follow Buddhism. It has been a tightly-controlled part of China since it was annexed in the 1950s, leading some online to ask how and why the project was approved in the first place.

Critics said the mountains were too fragile for fireworks, and the explosions, colour and smoke would have disrupted the ecosystem and local wildlife.