The improvements this weekend have given the Spaniard cause for optimism.
"Mercedes is out of reach in dry conditions," Alonso told reporters. "But I don't think Red Bull is too far away.
"Mercedes have been very strong in dry conditions, so if we can get good pace in the race, be close to Red Bull and even fight with them, it would be good news.
"Yesterday the car was a little bit more competitive than what we had in the first two races. Hopefully we can be closer, not 30 seconds behind like Bahrain."
The Chinese Grand Prix gets underway at 8am tomorrow.