editorial素材 - HANOI - JULY 20: Ancient village buildings against blue sky on July 20, 2012 in Hanoi, Vietnam. Hanoi has an estimated population of 6.5 million making it the second largest City in Vietnam.
HANOI - JULY 20: Ancient village buildings against blue sky on July 20, 2012 in Hanoi, Vietnam. Hanoi has an estimated population of 6.5 million making it the second largest City in Vietnam.