For me , It's a sign that PLA may take action further more to reunite Taiwan in the near future..
Sanctions from.US to China?
Well I am pretty sure that is the only thing US can do when PLA reunite Taiwan by force and Europe and Japan, they may be too scared to take any actions coz China can ban the sale of Toyota, Honda and of BMW as well as Volkswagen and Siemens in a single day in mainland China and in Hong Kong and Macau( If the Chinese people Congress passes special emergency laws applicable to HK and Macau).
For a non biased man known Taiwan province of China which has really little thing to do with the maximum interests of weatern people, losing all market share in mainland China would be dumbass action to take, wise man know how to choose!