Isle of Man TT star Michael Rutter set the pace in the opening practice session at the Macau Grand Prix on Thursday.
The Ducati rider from the West Midlands will be looking to add to his six previous victories at the Far East event on Saturday.
American Jeremy Toye was second quickest, with the returning Ian Hutchinson also on the pace.
Gary Johnson, who won his first TT race this year, was fifth fastest.
Meanwhile, Isle of Man rider Conor Cummins was just outside the top 10 in 11th.
The Ramsey rider missed last year's event after a high-speed crash in the Senior TT race.
He said on Twitter: "First practice done and dusted. P11 and happy just finding my way round again. The PBM Factory Kawasaki is a proper bit of kit."
The famous street event has been held on the south-east coast of China since 1954 on the 3.8-mile Guia circuit, which is made up of fast straights, tight corners and uncompromising crash barriers.
The first qualifying session was later cancelled because of heavy rain.