China has urged the United States not to allow the leader of Taiwan to "transit" the U.S. and reiterated its firm opposition to any nations establishing diplomatic and military ties with the island.

Foreign ministry spokesperson Geng Shuang reaffirmed China's position at a news conference on Friday.

Geng's remarks came after it was announced that Taiwan leader Tsai Ing-wen would spend two days in the U.S. in transit. China has made clear its position many times and lodged stern representations with the U.S. over the so-called stopovers made by Tsai, according to the spokesperson.

"We urge the U.S. side to abide by the one-China principle and the stipulations of the three China-U.S. joint communiques, not to allow the Taiwan leader to 'transit,' refraining from sending any wrong signal to the 'Taiwan independence' force," Geng said.

He hoped that the U.S. could properly handle related issues so as to avoid harming peace and stability in the region.

Regarding the U.S. potential arms sale to Taiwan, Geng stressed that China strongly condemns the transaction and urged Washington to stop it immediately as well as end any military connections with Taiwan.

Also on Friday, Ma Xiaoguang, a spokesperson for the State Council Taiwan Affairs Office, slammed Tsai Ing-wen and the administration of Democratic Progressive Party (DPP) for disregarding Taiwan people's wellbeing and "banking on foreign forces to build themselves up."

For their own selfish purposes, Tsai Ing-wen and the DPP administration has attempted to challenge the one-China principle with the help of foreign forces and seriously damaged peace and stability across the Taiwan Strait, he said. 

"The DPP administration has wrongly judged the situation and turned against the will of the people, and will not escape the fate of being abandoned by the people," he said. 

"No element should underestimate our resolve and ability to safeguard national sovereignty and territorial integrity," Ma added.

(With inputs from Xinhua)