Thai villagers scouring a dark cave for bat feces or guano sought by farmers as a nutrient-rich crop fertilizer say they are undaunted by scientists' suggestion that their pursuit could be behind the coronavirus that has killed millions around the world. Guano collecting began generations ago and is a traditional trade for many in the village. In three hours, they can amass as many as 500 buckets of bat dung. Here, CGTN reporter Dusita Saokaew explores it with some Thai guano collectors.