Neither of yout two assertions, that they have played many venues in Beijing, or that they shared a stage with Sonic Youth seemed to me to be an assertion of notability that rises level required by CDS A7. However, since I can see that some people would see opening for a major band as an assertion of notability, and given that the show occured outside of the band's country, I will restore the article. However I am going to nominate for AfD. That will give you five days to improve the article and/or convince a wider audience that the band is notable. I would suggest that you find a better source for the Vienna gig, as a jpg of a poster merely proves that the poster was printed, not that the gig happened.