Wu’s quarter-final opponent will be England’s Barry Hawkins, who ended in-form Lisowski’s winning run with a 6-4 success.
Lisowski, who defeated Ronnie O’Sullivan in the third round on Tuesday, knocked in century breaks in three consecutive frames as he fought back from 4-0 behind to draw level with Hawkins.
But the former World Championship runner-up restored his lead with a break of 75 in the ninth frame on his way to confirming his place in the next round.
World champion Zhao Xintong of China and England’s four-time Crucible winner Mark Selby will meet in one of the other quarter-finals, following 6-1 wins against China’s Si Jiahui and Scotland’s Anthony McGill respectively.
The line-up for the last eight will be completed later on Wednesday, with the four remaining last-16 matches starting at 11:30 GMT.
Ding Junhui, last year’s International Championship winner, will face Masters champion Shaun Murphy in his fourth-round match.
