"Many people see this as Trump breaking away from the diplomatic practices of the past 37 years, and they see that as a major change in policy", says Sam Zhao, a professor at DU's Josef Korbel School of International Studies and director of the Center for China-U.S. Cooperation.
"China has to prepare for the worst", it said.
The phone conversation last Friday between Tsai and Trump broke a more than 4-decade-old precedent barring such direct communication and set off a firestorm of controversy in Washington over Trump's apparent indifference to diplomatic protocol.
"The President of Taiwan CALLED ME today to wish me congratulations on winning the Presidency". It's not that Trump was unfamiliar with the "Three Communiques" or unaware of the fiction that there is "One China".
Yates suggested Tsai should make more contacts with ordinary American people if she has the chance, because, from the results of the US presidential election in November, people can see the difference between Washington political circles and public opinion, Lo said.
"Did China ask us if it was OK to devalue their currency (making it hard for our companies to compete), heavily tax our products going into their country (the U.S. doesn't tax them) or to build a massive military complex in the middle of the South China Sea?" I don't think so!
China, which split with Taiwan during a civil war in 1949, continues to threaten to use force to reunify with it if deemed necessary. Representatives of the latter then fled to Taiwan. The US also "acknowledged the Chinese position" that Taiwan is part of China. Some of Trump's top candidates for secretary of state, including Jon Huntsman, a former ambassador to China, are very familiar with the issue and would probably advocate an adjustment in USA policy.
Meanwhile, Shi Yinhong, an expert on US-China relations at Renmin University, points out that Beijing's tolerance indicates goodwill to the new American leader but countermeasures will be implemented if Trump breaches another boundary.
Srikanth Kondapalli, a professor of Chinese Studies at the New Delhi-based Jawaharlal Nehru University said that USA presidents have had unpublicized conversations with their Taiwanese counterparts in the past.
"We seem to be in for interesting times". The message, as John Bolton correctly put it, was that "the president of the United States [will] talk to whomever he wants if he thinks it's in the interest of the United States, and nobody in Beijing gets to dictate who we talk to". Kim Jong-un may take advantage of the early months of Trump's presidency to test the new leader - something his father, Kim Jong-il, did by detonating a second nuclear device shortly after Obama's first term as president.
India and China share prickly ties, with Beijing suspicious of New Delhi's warming ties with Washington and India wary of China's close ties with Pakistan. Perhaps China will choose not to take what Trump tweets as planned policy.
The talk among Mr. Trump's advisers is not about recognizing Taiwan, but regularizing the way the USA interacts with it, says Mr. Lohman, which does not mean overturning the One China Policy. It has reclaimed land from the sea and built military stations to bolster its claims in the area. China claims nearly all of the South China Sea angering neighbors like the Philippines and Vietnam.
For India, said Sibal, "Anything that can contain China will be good for us".