A teenager in Dezhou, Shandong province, has been hailed as the "coolest boy" by his classmates for wearing just a short sleeve T-shirt and a thin pair of pants in winter.
In summer, the peculiar lad only feels comfortable when wearing thick clothes.
Zhang Le (not his real name), now 16, was the same as other kids his age before starting the second grade of junior high school.
Since then, he has worn cooler garments in winter and warmer in summer, his mother says.
The poor woman has appealed to hospitals for a free check-up.