The 26-year-old fired a 5-under 67 at Taifong Golf Club to finish at 20-under, capitalising on Hung’s back-to-back bogeys at the 15th and 16th holes. Hung closed with 70.

The victory moves Wu from 73rd to 28th on the Asian Tour Order of Merit and earns him a place in next week’s US$5 million PIF Saudi International presented by SoftBank Investment Advisers in Riyadh.

Hung still jumped 53 places from 110th to 57th on the Merit list, all but securing his card for next season and extending his streak to 12 straight years on Tour.

Guatemala’s Jose Toledo carded the day’s best round, a 65, to tie for third at 12-under with Sweden’s Charlie Lindh (71). Pakistan’s Ahmad Baig (70) looked set to join them but bogeyed the par-5 18th hole to finish solo fifth.

Korea’s Heemin Chang (67) and Wooyoung Cho (70) shared sixth, later joined by Thailand’s Poosit Supupramai (70).

Wu began the day one behind Hung and drew level with his fourth birdie of the day on the 7th hole. Hung edged ahead again with a birdie at the par-3 8th hole – the same hole where Wu made a hole-in-one on Saturday – before the decisive swing came with Hung’s late bogeys.

Hung’s hopes rested on the closing par-5s, but he parred both. On the 17th hole he had to lay up after finding the left fairway bunker, and on the 18th his tee shot finished in thick rough.

With his wife Pam on the bag, Wu said: “It’s so special for me, very emotional. I only know one thing – all the hard work that I put in is for moments like these.

“I just talked to myself throughout the day. I just wanted to relax. I did not know about the future, but I knew that every shot I hit, I needed to stay within myself… just trust myself and hit the shot.”

On Hung’s mistakes, he said: “The two late bogeys by Hung were a bit of a cushion, but I knew I still had a job to do. I did not want to feel too confident at that stage.”

Wu also honoured his father from Chinese Taipei: “Actually, he taught me how to play golf. I think he knows the best and what I am capable of doing. He will be so proud of me.”

A frustrated Hung said: “I think I just didn’t have the luck to get it done today. I tried my best. To be honest, I don’t think I played any worse than him (Ekpharit). I can’t pinpoint any reasons, so, maybe, just my luck. Maybe, God wants me to work harder and maybe he’s planned for me an even bigger event.”

Toledo surged home in 31 for his best finish of the season, saying: “Actually, I have been hitting the ball quite well for a while but my results have not matched the way I have played. Today, I made a few putts towards the end and it got me a great round.”

Now up to 50th from No. 65, he added: “I was thinking about what to do next year, this and that, but I was also aware that I had three opportunities to get the job done and I am very proud that I have possibly secured my Asian Tour card for next season.”

Lindh, who made a double bogey on the 4th hole, said: “Got a double early and that took me back and I did not have a chance to win. The way those two guys played, I wanted to be just behind them. It’s been a good week overall. My best finish on the Asian Tour so far, so I am happy with that.”