A flawless final round of 64 saw Li Haotong claim the Volvo China Open title in Beijing this morning.
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However, birdies at the third, fifth, seventh, eighth, 10th and 11th holes drew the 20-year-old level with Aguilar, who by that point was the sole frontrunner.
Then, Aguilar double bogeyed on the 16th hole, which all but handed the trophy to world number 237 Li.
Another birdie followed on the 17th hole to stretch Li's advantage even further, before a par completed the triumph by a three-shot margin.
Chile's Aguilar held on for second spot, while Englishman Richard Bland nabbed a share of third place.