O'Sullivan collapses from 1/250 shot to defeat in China

The Rocket was in sensational form in the early stages of the match with breaks of 120 and 121 helping him race to a 3-0 lead.

At that stage, he was considered 1/250 with some bookmakers in-running and looked even closer to victory when 4-1 up.

However, he would fail to win another a frame as mistakes started to creep into his game while a more aggressive Liang starting potting more balls, while benefiting from some lucky breaks, to storm to victory.

The £625,000 prize pool makes the International Championship the most lucrative event in Asia but O'Sullivan will receive just £7,000 for crashing out in the second round.

Elsewhere, home hero Ding Junhui had an easier time of things than in the first round as he beat James Wattana 6-3 to keep up his bid for a third successive ranking event title.

Two-time world champion Mark Williams crashed out though as he was defeated 6-2 by Norway Kurt Maflin.

World number one Neil Robertson had no such problems though as he enjoyed a 6-1 win over Thepchaiya Un-Nooh while Mark Selby ground out a 6-4 win over Peter Lines.

Peter Ebdon 6-5 Mark Joyce

Mark Selby 6-4 Peter Lines

Liang Wenbo 6-4 Ronnie O'Sulivan

Stuart Bingham 6-4 Martin Gould

Fergal O'Brien 6-4 Rod Lawler

Zhao Xintong 6-1 Barry Hawkins

Neil Robertson 6-1 Thepchaiya Un-Nooh

Ryan Day 6-4 Alan McManus

Marco Fu 6-4 Xiao Guodong

Ding Junhui 6-3 James Wattana

Graeme Dott 6-1 Kyren Wilson

Kurt Maflin 6-2 Mark Williams

Mark Davies 6-3 Stuart Carrington

Mark Allen 6-4 Dave Harold

Joe Perry 6-3 David Gilbert

Matthew Stevens 6-2 John Higgins