"I do not think it will change the One-China policy that the US government has insisted on applying over the years," Chinese Foreign Minister Wang Yi said after unprecedented move by US President-elect, Hong Kong-based Phoenix TV reported.
"The One-China policy is the cornerstone of the healthy development of China-US relations and we hope this political foundation will not be interfered with or damaged," Wang said after Trump spoke to Tsai, a striking break with decades of US diplomatic practice not to directly speak with Taiwan leader.
Like most of the countries in the world, US too pursued a so-called "One-China" policy since 1979, when it shifted its diplomatic recognition by formally recognising People's Republic of China (PRC) instead of Taiwan which broke off with mainland in 1949 after the formation of the PRC.
However, US continues to maintain low-key contacts with Taiwan including supplying military hardware to it.
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China is trying to open up its channels with Trump as President Xi Jinping yesterday met former US Secretary of State Henry Kissinger who is widely regarded as part of back channel diplomacy between both the countries.
He said the mutual benefits of relations between the two countries outweigh their differences, and China is willing to work with the US for a smooth transition following last month's presidential election.
Xi said China and the US should continuously promote the new type of major power relations, and strengthen their coordination on international affairs.
Kissinger, a regular visitor to China, said the US-China relationship is important to the two countries, as well as the world as a whole. He hoped he can keep playing an active role in boosting the relationship.
A statement from Trump's transition team said he spoke with Tsai, who offered her congratulations.
Trump tweeted later: "The President of Taiwan CALLED ME today to wish me congratulations on winning the Presidency. Thank you!"
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"The (Taiwanese) president is looking forward to
strengthening bilateral interactions and contacts as well as setting up closer cooperative relations," the statement said.
"The president also told US President-elect Trump that she hopes the US will continue to support Taiwan's efforts in having more opportunities to participate in and contribute to international affairs in the future," Tsai's office said.
The Tsai-Trump telephone talk also set off controversy as the President-elect bypassed the State Department and traditional diplomatic protocols and dealing with world leaders directly without guidance from the established official channels.