Tim Cook hasn’t been shy about proclaiming China Apple’s future biggest market, but right now it’s causing the most problems.

According to analysts at Oppenheimer, Apple’s “Reality Distortion Field” is fading in China, as iPhone sales drop 20 percent. That’s at least twice as bad as any other market.

The crowd of Apple doomsayers grew louder today with a new note from analysts at Oppenheimer claiming Apple is projected to go through a long decline for the next ten years.