Technical staff just showed the wrong footage. Chinese players admitted the block touch to avoid any controversy.
Did they explain that at some later point? Ding Xia did make a guilty kind of face or something, but I'm wondering how you know that.
And then after they start back up Roberta serves and something weird happened so she served again. I'm watching the FIVB full match replay and the commentator seemed in the dark about both events. Oh well. Ancient history now.