Canada will no doubt be stung by repercussions from its ongoing diplomatic feud with China for years to come. In the long run, it will be worth it. Beijing’s new law banning “subversion” in Hong Kong is a transparent precursor to the elimination of the territory’s remaining sovereignty. For those who reside in Hong Kong, including 300,000 Canadians, it could well mean an end to many of their rights and freedoms. For the rest of the world, it is another step in Chinese Leader Xi Jinping’s aggressive expansion of Chinese power and influence on the world stage. Canada’s federal government, meanwhile, co-signed a statement on May 28 along with the United States, the UK, and Australia that said China had violated its international obligations by pushing through its new law for Hong Kong, which the statement said “would curtail the Hong Kong people’s liberties.” Canada has been at odds with China since the end of 2018, when police arrested Huawei executive Meng Wanzhou at the behest of the United States over allegations that she defrauded a bank and violated U.S. trade sanctions. China retaliated by blocking Canadian canola exports, and imprisoning two Canadians working in China, Michael Kovrig and Michael Spavor. Canada has also delayed making a decision on whether to allow Huawei to supply 5G telecommunications equipment in the country, which has been blocked by the United States and several other allies over concerns that it could be co-opted by China for the purpose of espionage. Canada-China relations will worsen now, after a B.C. judge ruled last week that Ms. Meng can be extradited to the United States. If Canada continues to press back against the Chinese government’s aggression, it will undoubtedly face a greater backlash that will be felt by Canadians who travel to or do business with China, including many farmers who export to the country. Mr. Spavor and Mr. Kovrig will likely suffer more. Failing to push back and stand up for international justice would come with an ever higher price, however. Caving to calls, including from some in Canada, to simply exchange Ms. Meng for Mr. Spavor and Mr. Kovrig would send a clear message to the world that the Chinese elite are above the law, not only at home but in Canada as well. It would also validate China's strategy of taking Canadians hostage whenever it wishes Canada to bend to its will. Failing to push back against China’s assault on free Hong Kong, in whatever modest ways that Canada can, would likewise become a shameful footnote in Canada’s history on the world stage. To begin with, Canada should offer refuge to Hong Kong activists who flee oppression from authorities controlled by or sympathetic to Beijing. Canadians still remember prime minister Brian Mulroney’s stand against apartheid in South Africa proudly. Standing up to China will come at a much steeper price. In the long run, it will be worth it.