The National Speed Skating Oval - also known as the "Ice Ribbon" - completed its ice-making work for the Beijing Winter Olympics speed skating tracks yesterday.

The ice production was an international effort led by Canadian ice technician Mark Peter Messer, as well as the ice-making team of the National Speed Skating Oval and teams from Harbin and Changchun.

The newly-built arena is the world's first Winter Olympic venue that produces ice using carbon dioxide, which is currently the most environmentally friendly ice-making technology, with near-zero carbon emissions and improved efficiency.

The technology uses heat generated from the ice-making process to melt ice in a cistern and maintain the ice surface. Compared with traditional ice rinks, the energy efficiency of the "Ice Ribbon" can be improved by more than 20%.

The temperature difference on the ice surface does not exceed 0.5 degrees centigrade, which is beneficial for athletes to log good results, and the venue can make ice according to the needs of different sports, regions, and standards.

Messer began his career with Olympic Ovals in May 1987, and Beijing 2022 will be his sixth Olympics. After nearly four decades of perfecting the art of ice-making, Messer enjoys a worldwide reputation as an "ice master."

The National Speed Skating Oval officially entered the closed-loop management beginning Jan. 23.

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