Taiwan's foreign minister says the island will defend itself "to the very last day" if attacked by China.
Joseph Wu says China's attempts at conciliation while engaging in military intimidation are sending "mixed signals" to the island's residents.
China claims Taiwan as its own territory to be won over peacefully or by force.
Wu has noted China flew 10 warplanes into Taiwan's air defence identification zone on Monday and deployed an aircraft carrier group for exercises near Taiwan.
"We are willing to defend ourselves, that's without any question," Wu told reporters on Wednesday. "We fill fight a war if we need to fight a war, and if we need to defend ourselves to the very last day, then we will defend ourselves to the very last day."
China does not recognise Taiwan's democratically elected government, and leader Xi Jinping has said "unification" between the sides cannot be put off indefinitely.
"On the one hand they want to charm the Taiwanese people by sending their condolences, but at the same time they are also sending their military aircraft and military vessels closer to Taiwan aimed at intimidating Taiwan's people," Wu said at a ministry briefing.
"The Chinese are sending very mixed signals to the Taiwanese people and I would characterize that as self-defeating," Wu said.
The vast improvements in China's military capabilities and its increasing activity around Taiwan have raised concerns in the US, which is legally bound to ensure Taiwan is capable of defending itself and to regard all threats to the island's security as matters of "grave concern".
Speaking in Washington, State Department spokesman Ned Price reaffirmed the US commitment to Taiwan.
"The United States maintains the capacity to resist any resort to force or any other forms of coercion that would jeopardise the security or the social or economic system of the people on Taiwan," Price said.
The naval drills being conducted in waters off Taiwan were meant to help China "safeguard national sovereignty, security and development interests", the army said Monday, using language often interpreted as being directed at Taiwan's leadership that has refused to give in to Beijing's demands that it recognise the island as part of Chinese territory.