Taiwan said it wants peace but will defend its own citizens if situations need it.

"Don’t cross the line. China again flew fighter jets into Taiwan’s Air Defense Identification Zone today. Make no mistake, Taiwan wants peace but we will defend our people," Taiwan Vice President  Lai Ching-Te tweeted.

Meanwhile, Taiwan President Tsai Ing-wen responded to increased Chinese military activity near Taiwan by visiting two air defense bases on Friday, media reports said.

She said the country's army is ready to protect the nation.

"Our men & women in uniform are committed to protecting #Taiwan. And this is my response to the #PRC military threat," she tweeted.

“When it comes to our sovereign territory, we don’t give an inch. When it comes to democratic freedoms, we stand firm,“ she wrote in an English-language tweet.

While the Taiwanese military was engaging in a live-fire exercise involving its arsenal of long-range missiles early on Wednesday (Sept. 9), several People's Liberation Army Airforce (PLAAF) fighter jets penetrated Taiwan's Air Defense Identification Zone (ADIZ), prompting the Air Force to issue 24 warnings to drive the Chinese warplanes away, reports Taiwan News.