Saturday's Beijing round of 16 pits Alexander Zverev against Juncheng Shang on hard. Alexander Zverev is 9-1 across recent matches. Juncheng Shang comes in at 3 wins from the last ten.
Zverev's 73.7% behind the first serve (against 69.7% for Shang) means break chances should be scarce in one direction. If Zverev plays anywhere close to a normal level, this ends in relatively comfortable fashion.