"Sports has nothing to do with politics," Wang said. "It is they who have written, directed and performed this farce."
China is confident there will be no chain reaction, and perceives overwhelming global support for the games, he said.
"As of now, numerous heads of state, leaders of government and royal family members have registered to attend the Beijing Winter Olympics, and we welcome them," Wang said. "China is committed to making greater contributions to the international Olympic cause and will offer up a streamlined, safe and exciting Olympics to the world."
China has vowed to respond to the US with "firm countermeasures" over the boycott, but has given no details on how it plans to retaliate.
Rights groups have called for a total boycott of the Beijing Winter Games, citing Chinese human rights abuses against its Uyghur minority in the northwest Xinjiang region, which some have called genocide. They also point to Beijing's suppression of democratic protests in Hong Kong and a sweeping crackdown on dissent in the semi-autonomous territory.
Canada's move came as little surprise in the context of the sharp deterioration in bilateral ties since China arrested two Canadians in December 2018, shortly after Canada arrested Meng Wanzhou, Huawei Technologies' chief financial officer and the daughter of the company's founder, on a US extradition request.
Canada and others condemned what they called "hostage politics," while China described the charges against Huawei and Meng as a politically motivated attempt to hold back China's economic and technological development.
China, the US and Canada completed what was essentially a high-stakes prisoner swap earlier this year, but the Chinese government's reputation has been severely tarnished in Canada.
Along with the boycott controversy, the pandemic has dictated that promotional events for the games be relatively low key, particularly when compared to the frenzied campaign launched ahead of the 2008 Beijing Summer Olympics.
China that year staged a global torch relay that sparked violent confrontations along the route between opponents of the ruling Communists and the party's supporters. The relay has been canceled entirely this year.
At Beijing University of Posts and Communications, senior student Hu Xinran expressed a note of disappointment after waiting in line for 40 minutes to have her picture taken with a somewhat diminished Olympic flame.
"When I heard the flame was coming to our college, I was expecting it to be on the torch," Hu said. "But today I only saw a small flame in a lantern."
"I think the torch relay like that for Beijing 2008 was much more interesting. In my opinion, that was more fun."
