wording isn't the issue. China has always used "liberation" or "reunification" of Taiwan. The term in Chinese is not 侵略 or 占领 Taiwan, it is 解放 Taiwan or 统一 Taiwan. Chinese media has not used the word "invasion" refering to Taiwan.There are books (Words That Work by Frank Luntz 2008, Political Mind by George Lakoff 2008, and more) that discuss words and the frames that they activate in the mind. The gist of it is that many words have connotations. For example, the word independence activates the frames of fighting for independence, freedom, etc. These are positive connotations. The group that is on the other side is automatically framed in the mind as someone bad who is trying to deprive them of their independence - an oppressive totalitarian enemy.
Invasion similarly has negative connotations. Think of the related items: home invaders, alien invasion, invasive species, etc. All are negative. Notice how the word invasion is used by the imperial west. I routinely see successful Chinese exports being framed as invasions such as the "Chinese car invasion". Yet, I don't recall seeing Western products being described as invading foreign nations. Look at the news over the Russia-Ukraine conflict. I constantly see minor variations of "Russia's invasion of Ukraine". This is no accident.
Yet does this prevent certain country's media from calling it an invasion? How are you gonna physically stop them from calling it an invasion?