China's Huawei Chief Financial Officer Meng Wanzhou leaves her residence for the extradition hearing in Vancouver, Canada, Jan. 20, 2020. (Photo by Harrison Ha/Xinhua)

China said it is concerned about the Canadian side's refusal to provide necessary documents related to Huawei executive Meng Wanzhou's case, and has lodged solemn representations about it, Chinese Foreign Ministry said on Tuesday.

"Interfering with judicial cases by concealing information, is this what Canada calls judicial justice?" Wang Wenbin, a spokesperson for China's Foreign Ministry, said at a regular press conference in Beijing on Tuesday. 

In the latest action in her fight to avoid extradition to the US, Meng's lawyers demanded the release of unredacted Canadian spy service documents they claim will prove Canada plotted with the FBI.

Lawyers for the Canadian attorney general have released some of the requested documents, but claimed privilege over others, saying "a full unredacted release of the documents would compromise national security," according to a Reuters report.

"Anyone without prejudice can clearly see that Meng's case is a serious political incident. The Chinese side once again urges the Canadian side to take seriously China's solemn position and concerns and proceed from the merits of the matter and its own interests to resolve it as soon as possible," Wang said.

Meng was arrested at Vancouver International Airport in December 2018 by Canadian authorities at the request of the US for allegedly violating US law. She faces fraud charges. The Supreme Court of British Colombia approved a new schedule for the extradition case in June that would see hearings run into next year.

The case against Huawei CFO Meng Wanzhou is a serious political issue in which the US is abusing its extradition bill with Canada and attempting to suppress Huawei and China's high-tech companies, Wang said on Monday.