Bubba Watson topped the leaderboard at the Shenzhen International after an opening round curtailed first by the threat of lightning before darkness saw play suspended for the day.
Two-time Masters winner Watson, making his fourth appearance at the tournament, recovered from an early bogey to post a six-under 66 at the Genzon Golf Club - his lowest round of the year to date.
That gave the American a one-shot lead over the rest of the field, with five players tied on five under and a further four just two off the pace.
Jason Scrivener is the best-placed Australian in a tie for 18th after a two-under 70, compatriots Sam Brazel and Wade Ormsby carded rounds of 71 while Andrew Dodt is one under after 12 holes.
Brett Rumford fired an even par 72 while Scott Hend (one over) and Nathan Holman (five over after 11 holes).
"You know anytime you shoot six under, shoot in the 60s, you're happy with it but every golfer can pick and choose what they wish they did better" Watson told the European Tour website.
"But all in all a great day and a good start.
"I just made putts today.
"Most of my swings and most of my shots were really good today and there were no bad swings in there so it just made the score better."
Watson had completed his round when almost two hours of play was lost because of the lightning threat, while South African pair Dean Burmester and Haydn Porteous, France's Gregory Bourdy, Thailand's Thongchai Jaidee and Maximilian Kieffer of Germany were also able to finish to sit within a shot of the leader.