Chinese state media said in January that Garratt had been indicted in Dandong, a city in China's northeast right on the border with North Korea, where the Garratts had operated a Christian coffee shop since 2008.
Li said that Garratt would be treated humanely and his case would be handled in accordance with the law.
But following a series of key political meetings during his first trip to Beijing as Prime Minister, his achievements looked little different from those of his predecessors: China ticked boxes on its agenda.
Trudeau has indicated in the past that there's no evidence to support the accusations against Garratt, though he did not say what China has told him about Garratt's case. The Canadian Prime Minister on Wednesday would say only that he had set the groundwork for the two sides to be "frank and open about concerns, questions and issues".
The statement also said the size of Canada's shareholding would be decided at that time.
"Certainly we're trying to show that we are prepared to see China take an important in the global economy", said Burton, a political scientist at Brock University.
The multilateral institution, seen as a rival to the Western-dominated World Bank and Asian Development Bank, was initially opposed by the United States but attracted many USA allies including Britain, Germany, Australia and South Korea as founding members.
During his trip to China, Trudeau will also visit Shanghai and Hong Kong and attend the G-20 summit in Hangzhou on September 4-5.
Trudeau's predecessor, Stephen Harper, had a chillier reception on his first visit to Beijing in 2009, three years into his term, when then-Premier Wen Jiabao publicly berated him for not visiting sooner.
Trudeau introduced Xi to Canadian ambassador Guy Saint-Jacques and three of his cabinet ministers: International Trade Minister Chrystia Freeland, Finance Minister Bill Morneau and Foreign Affairs Minister Stephane Dion.
Chinese Premier Li Keqiang told Trudeau in their meeting China was willing to cooperate with the new Canadian government to boost ties, and called on the two nations to accommodate each other's differences, state-run CCTV reported.
China has also been keen to start talks on a free trade agreement with Canada, similar to the pacts Beijing has sealed with Australia and New Zealand, although a senior Canadian government official said last week there is no near-term chance of agreement.
"As prime minister, it is my job to make sure that our government helps to create the best conditions for economic growth, and in Canada, we know, we can't do that on our own", said Trudeau.