Felipe Nasr says he hopes Sauber can address the issues which have restricted his progress so far in the 2016 season.
Nasr has struggled across the opening two rounds of the campaign and qualified in last position in Bahrain before racing to a low-key 14th place.
"Looking back to the Bahrain Grand Prix about a week ago, I hope that the team was able to sort out the issues I had with the C35," he said.
"The objective is clearly to be more competitive."
Nasr scored points on his first visit to China last year and is drawing positives from that experience.
"My first Formula 1 race weekend at the Shanghai International Circuit was quite positive last year," he explained.
"We improved the car during the whole weekend and, after a top ten qualifying, I finished the race in eighth."