Uncle Ah-Hui Charcoal-Roasted Sweet Potatoes. Uncle Ah-Hui Charcoal-Roasted Sweet Potatoes uses charcoal to roast sweet potatoes locally produced in Zhushan. The roasted sweet potatoes are fragrant, sweet, delicious, firm in texture, and affordable. It's a must-try when you visit Zhushan. Uncle Ah-Hui Charcoal-Roasted Sweet Potatoes uses charcoal to roast sweet potatoes locally produced in Zhushan. The roasted sweet potatoes are fragrant, sweet, delicious, firm in texture, and affordable. It's a good choice for tasting roasted sweet potatoes when visiting Zhushan. Address: 南投縣竹山鎮竹山路133號 Hours: 00:00–23:59 Nantou