Taiwan signalled on Thursday that it had abandoned a plan to buy advanced new anti-submarine warfare helicopters from the United States, saying they were too expensive.
Russia recognises Taiwan as an inalienable part of China and rejects the island's independence in any form, according to a joint Russian-Chinese declaration released on Friday.
"The Russian side reaffirms its support for the One-China principle, confirms that Taiwan is an inalienable part of China, and opposes any forms of independence of Taiwan," the statement read.
Taiwan on Sunday reported the largest Chinese incursion in its air defence zone since October. After the latest uptick in tensions, Taiwanese fighters scrambled to warn away 39 Chinese aircrafts. It also deployed missile systems to monitor them.
China regards democratic, self-ruled Taiwan as its own, to be retaken by force if necessary, and has long said its status is one of the most sensitive and important issues in Beijing's dealings with the United States.