What does "被续了" mean?
It's a Chinese (political) joke. It has been told that a boy is killed to lengthen the former (×2) chairman, Zemin Jiang. But it's not proven to be true yet. It's alright to used chatting with people of new generations in China. And it has somehow become a meme among them.

When people say 续命、续一秒、+1s , they are also talking about that.