Canada said on Thursday that 13 of its citizens have been detained in China since the arrest of Huawei's Ms Meng. Kovrig and Spavor remain in custody. "They are more concerned than before", said the Canadian, who spoke on the condition of anonymity.
Liu stressed that China is a country under the rule of law and will protect the interests of the parties concerned during the process.
"We'll be prepared to discuss it, explain our side of things, and hope that they'll take that message back to their executive side", Sen. The U.S., Australia and the United Kingdom have joined Canada's call for their release.
The US advisory notice followed the detention last month of two Canadians in China, accused of harming the country's security.
The updated guidance was issued amid increasing tensions between the US and China over ongoing trade disputes, as well as the December 1 arrest of Huawei Technologies Chief Financial Officer Meng Wanzhou in Vancouver.
The Chinese government has not drawn a direct link between the detention of any Canadian and Meng's arrest. Apple CEO Tim Cook has suggested he will not be revising his own plans to travel to China, though it would be tough to see the Chinese government holding Cook considering there are seemingly no grounds to do so. Ambassador Lu Shaye has called Meng's detention "a miscarriage of justice" and said it has "no basis in global law".
Xi: Taiwan part of China, unification 'inevitable'
While the president said "Chinese don't beat Chinese", he noted that the mainland was "not committed to renouncing the use of force".
He said he would not be leaving in the near future as he has siblings in China, and his job demanded his presence for now.
"We have our work cut out for us in terms of explaining our system and how it's different".
The pair face accusations of harming national security and, on Thursday, China's top prosecutor said they had "without a doubt" violated the law. "Mutual understanding and mutual benefit comes after we get to know one another", he said. "Until you do that, you don't get beyond the diplomatic niceties".
A delegation of Canadian legislators is now en route to China to discuss the incarceration of Kovrig and Spavor, along with other factors in the strained relationship between Beijing and Ottawa.
Day is leading a six-member delegation of the Canada-China Legislative Association on a trip that had been planned before the current controversy erupted.