CASTRO VALLEY (KRON)—A 67-year-old man from Castro Valley has been reported missing, according to the Alameda County Sheriff’s Office.

Shuangcheng Yang was last seen at his home on Stanton Avenue at 2 p.m. on Tuesday.

Yang is described by his family as 5 feet 3 inches tall with gray hair and weighing 140 pounds. He was last seen wearing blue jeans, a red plaid shirt, a orange vest and brown sandals.

Yang only knows how to speak Mandarin. His family he says he might have gone outside for a walk and got lost or hurt.

If you know anything about his whereabouts, you are asked to call the Alameda County Sheriff’s Office at (510)667-7721.