Hidden in Wuxuan is the Baiyacao Grand Canyon, a secret paradise. Verdant mountains, cascading waterfalls, and crystal-clear waters soothe the soul; a stroll through it is a truly therapeutic experience. However, even though it's nearing autumn, I found caterpillars on many of the railings. Although I avoided touching them, their hairs likely got on my exposed arms, causing redness, swelling, itching, and pain that lasted for days…