It's been an encouraging start to the weekend for the team, completing plenty of mileage in practice. But, the battle at the front of the field looks as close as ever.
"We've had a fairly normal Friday programme here, a few test items on the cars for the early running but mainly we have been focussed on understanding the car balance and the tyre behaviour for Qualifying and the race," explained Trackside Engineering Director, Andrew Shovlin.
"We only tried the Soft tyre during FP1 but the initial feedback from the drivers was quite encouraging and the car seemed to be working well. Shanghai is never an easy track to balance because there are so many different types of corner but overall we seemed to be in reasonable shape.
"FP2 saw us running all three tyres, both using UltraSoft but splitting the harder tyres so that Valtteri could focus on the Medium and Lewis on the Soft. We had concerns over the UltraSoft coming into this event but it was surprisingly consistent over the long runs.
"The Soft and Medium runs were cut short by the rain when it finally arrived although we managed to get a feel for the grip and balance and it seems that most of the other teams were also unable to complete their plans.
"The conditions are very cool today, similar to winter testing, and that does change the way the tyres behave. We are expecting more mixed weather tomorrow and our normal Qualifying preparation could be affected by a bit of rain in FP3. However, for Sunday the current forecasts show the sun coming out and we should get a much hotter track.
"It's clear that ourselves, Red Bull and Ferrari are closely matched on pace and, as always, they will be improving their cars overnight so we will be working with our usual diligence to try and find every last bit of performance."