Ideally, DP 2 should have done $125-200mn in China IMO, but its long-delayed release and piracy would have done its job. Even if not piracy, it been over 6 months since the film was released digitally.
On Douban, there are 157k votes for the film with a rating of 7.5 as compared to 257k votes for Ant-Man and The Wasp. That's not a big difference for a film that wasn't released there, in other words, the film is already watched there.