"You should be gentle, very, very gentle," said Xiong, who performs traditional eyelid shaves at his roadside location in Chengdu, the capital of the southwestern province of Sichuan.
Customers swear by the practice of "blade wash eyes", as it is known in Mandarin, saying they trust Xiong's skill with the blade.
Xiong, 62, said he learned the technique in the 1980s and serves up to eight customers a week, charging 80 yuan ($12) per shave.
"It was difficult at the beginning, but it became a piece of cake afterwards," he said.
The technique appears to unblock moisturizing sebaceous glands along the rim of the eyelid, said Qu Chao, an opthalmologist who works at a nearby hospital in Chengdu.
She said there was a risk of infection if the equipment was not sterilised.
While customers insisted their eyes felt better after a shave, onlookers cringed at the sight of Xiong wielding his razor.
"I am afraid to do it," said He Yiting, 27, who winced as she watched.
(Reporting by Thomas Suen; Writing by Karishma Singh; Editing by Darren Schuettler)
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