O’Sullivan, who has not received a rating occasion for over two years, added: “I will see out the next 18 months and see how we go. I don’t want to throw the towel in just yet. I’ve committed to playing until then.
“I would like to give myself an opportunity. I’d hate to end my profession on performances like that.”
O’Sullivan lost the opening two frames against Chang but pulled himself back into the match to head into the mid-session break level at 2-2.
When play resumed, China’s Chang took control, winning two frames in a row to lead 4-2.
O’Sullivan pulled one back but breaks of 69 and 48 in the following frames booked Chang a place in Saturday’s final – and his very first win against ‘The Rocket’.
“Every time I play towards Ronnie, it is a pleasure,” stated 24-year-old Chang.
“He most likely wasn’t in the most effective kind right this moment, and I managed to take among the alternatives that got here my method.”
Chang will face both Xiao Guodong or new world primary Zhao Xintong in the ultimate.