Mike Conway set the early pace at Shanghai as he took the No.7 Toyota TS 050 HYBRID to P1 with a best lap of 1m47.182s.
Porsche placed second and third as the No.1 919 Hybrid lapped marginally faster than No.2 car which is targeting the drivers' title this weekend.
The Fuji-winning No.8 Toyota placed fourth in first 90-minute session of the day.
The No.13 Vaillante Rebellion topped LMP2 times as Mathias Beche claimed the top spot with a 1m52.533s lap
Stefan Mucke set the fastest lap in LMGTE Pro class with a 2m02.693s lap in the Ford GT he shares with Olivier Pla. The German claimed best time after shaking off a tire problem earlier in session
|Cars lineup for practice|
Aston Martin Racing was second with a 2m03.181s lap set by Darren Turner.
No.91 Porsche 911 RSR of Frederic Makowiecki and Richard Lietz took third to make it three different GT manufacturers in top three positions.
Ferrari struggled for pace in session and place seventh and eighth in class as No.51 AF Corse car headed sister No.71 488 GTE.
Spirit of Race Ferrari fastest in LMGTE Am as Miguel Molina sets a late 2m04789s lap. The Fuji-winning car heads Dempsey Proton Porsche which sees Matteo Cairoli lead category for most of session..
Practice 1 Results
|1st||Conway M. Kobayashi K. LOPEZ J.||#7||35||1:47.182||+0.000s||+0.000s|
|2nd||Jani N. Lotterer A. Tandy N.||#1||35||1:47.414||+0.232||+0.232|
|3rd||Bernhard T. Bamber E. Hartley B.||#2||34||1:47.637||+0.455||+0.223|
|4th||Buemi S. Davidson A. Nakajima K.||#8||36||1:47.929||+0.747||+0.292|
|5th||Beche M. Heinemeier Hansson D. Piquet Jr N.||#13||36||1:52.533||+5.351||+4.604|
|6th||Rusinov R. Roussel L. MULLER N.||#26||37||1:53.154||+5.972||+0.621|
|7th||GONZALEZ R. Trummer S. Petrov V.||#25||33||1:53.330||+6.148||+0.176|
|8th||Perrodo F. VAXIVIERE M. Collard E.||#28||21||1:53.528||+6.346||+0.198|
|9th||Tung H. Jarvis O. Laurent T.||#38||33||1:53.561||+6.379||+0.033|
|10th||Canal J. Prost N. Senna B.||#31||32||1:53.890||+6.708||+0.329|
|11th||Lapierre N. Menezes G. Negrao A.||#36||34||1:54.031||+6.849||+0.141|
|12th||Cheng D. Brundle A. Gommendy T.||#37||36||1:54.196||+7.014||+0.165|
|13th||Rao M. Hanley B. VERGNE J.||#24||27||1:54.212||+7.030||+0.016|
|14th||Mucke S. Pla O.||#66||23||2:02.693||+15.511||+8.481|
|15th||Turner D. Adam J.||#97||40||2:03.181||+15.999||+0.488|
|16th||Lietz R. Makowiecki F.||#91||30||2:03.191||+16.009||+0.010|
|17th||Thiim N. SORENSEN M.||#95||29||2:03.404||+16.222||+0.213|
|18th||Christensen M. Estre K.||#92||30||2:03.405||+16.223||+0.001|
|19th||Priaulx A. Tincknell H.||#67||32||2:03.474||+16.292||+0.069|
|20th||Calado J. Pier Guidi A.||#51||35||2:03.642||+16.460||+0.168|
|21st||Rigon D. Bird S.||#71||34||2:04.017||+16.835||+0.375|
|22nd||Flohr T. Castellacci F. MOLINA M.||#54||35||2:04.789||+17.607||+0.772|
|23rd||Ried C. Cairoli M. DIENST M.||#77||32||2:05.165||+17.983||+0.376|
|24th||Dalla lana P. Lamy P. Lauda M.||#98||39||2:05.556||+18.374||+0.391|
|25th||Al Qubaisi K. Barker B. Foster N.||#86||36||2:05.666||+18.484||+0.110|
|26th||MOK W. SAWA K. Griffin M.||#61||38||2:05.911||+18.729||+0.245|