Anyone who spots Quan should call 999 (Credit: Metropolitan Police)
Quan was last seen in the area a week ago and officers are concerned for his welfare.
“We don’t think he will know how to contact police for help as his English is limited,” said a spokesperson for the Metropolitan Police.
“He also won’t know the area he is in.”
Detectives first shared an appeal for help finding Quan on Sunday and confirmed he is still missing this morning.
Anyone who spots the teenager is asked to call 999 and reference 5417079/21.
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