During his career he won many tournaments in the Asia-Pacific region, including the Philippine, Taiwan and Singapore national opens on the Asia Golf Circuit.

[1] He attempted to defend his championship the following year and was successful early, holding a share of the lead after the first round.

Having tied competitor Hideyo Sugimoto at the end of regulation play, Hsu made a bogey at the first playoff hole to finish second.

[8] Hsu and teammate Hsieh Yung-yo led the way after the first 36 holes with a 277 total,[9] and eventually finished in a tie for fourth.

He held the lead after the first round of the 1973 Thailand Open with Walter Godfrey and Japan's Akio Toyoda.

[10] The following year he finished the 1974 Indonesia Open tied in regulation with Australian Graham Marsh and Filipino Ben Arda.

[12] In the next round, he broke the record at the Subang National, shooting a 69 (−3) to take the solo lead.

[18] His performance over the final three days was better than all players except Johnny Miller, Jack Nicklaus, Raymond Floyd, and Vicente Fernández.

Staving off challengers Ben Arda, Mya Aye, and Tomoni Suzuki, the veteran Hsu would play "steady" golf amidst the "tense" environment and win by one shot.

In 1978 he played excellently at the Asia Golf Circuit's unofficial opener, the Philippine Masters, shooting two-under in "high winds" to win by one.

Hsu finished joint runner-up with Lu and fellow Taiwanese Chen Tze-ming, three back of Norman.

[1] Asia Golf Circuit playoff record (0–3) Note: The Open Championship was the only major Hsu played.