In this Wednesday, June 21, 2017, photo, Nguyen Kim Lan reads a newspaper as he waits for customers at an intersection in Hanoi, Vietnam. Lan, 62-year-old traditional motorbike taxi driver, or Xe Om, used to make a decent living shuttling customers, but his clientele has dwindled as young and tech-savvy Vietnamese increasingly use ride-hailing apps like Uber and Grab to summon cheaper, safer motorbike taxis. (Photo by Tran Van Minh/AP Photo)





This picture taken on June 27, 2017 shows a deliveryman on a motorcycle transporting a bust of Vietnam' s late president Ho Chi Minh to a customer in downtown Hanoi. (Photo by Hoang Dinh Nam/AFP Photo)





In this photograph taken on July 19, 2017, a bride and groom get their photo taken by a portrait photographer in the streets of downtown Hanoi. (Photo by Roberto Schmidt/AFP Photo)





A Viet Namese soldier guards the contaminated site at the edge of the Da Nang Airfield on July 1, 2009 in Da Nang, Central Viet Nam. During the Viet Nam War, the U.S. military stored more than four million of gallons of herbicides, including Agent Orange, at the military base that is now a domestic and military airbase. More than 30 years later there are still high levels of toxins in the soil, toxins that have seeped into a near by lake and have moved through the food chain into (Photo by Kuni Takahashi/Getty Images)





In this June 21, 2017, photo, motorbikes and cars fight for space on a street in Hanoi, Vietnam. Vietnam’s motorbike taxis are seeing their business dry up as customers increasingly opt for ride hailing services like Uber and Grab-Taxi. (Photo by Tran Van Minh/AP Photo)





A farmer works on a terraced paddy field for the new rice season in Vietnam's northern Mu Cang Chai district, 360 km (225 miles) northwest of Hanoi, June 6, 2016. (Photo by Reuters/Kham)





A farmer harvests rice at Muong Thanh valley, in Dien Bien province, Vietnam June 7, 2016. (Photo by Reuters/Kham)





Motorcycles are seen on a street in Hanoi, Vietnam June 30, 2016. Picture taken June 30, 2016. (Photo by Reuters/Kham)





A man transports seafood for sale on a motorcycle on a street in Hanoi, Vietnam June 30, 2016. (Photo by Reuters/Kham)





Motorcycles are seen on a street in Hanoi, Vietnam June 30, 2016. Picture taken June 30, 2016. (Photo by Reuters/Kham)





A woman feeds chicken near a wind power system made from plastic buckets at a floating village in Hanoi, Vietnam July 4, 2016. (Photo by Reuters/Kham)





People play “Pokemon Go” by Hoan Kiem Lake in Hanoi, Vietnam, August 18, 2016. (Photo by Reuters/Kham)





A man rides a scooter next to a bus on a street in Hanoi, Vietnam September 30, 2016. (Photo by Reuters/Kham)





Women work at a tea factory producing black tea for export in Yen Bai province, Vietnam, August 4, 2016. (Photo by Reuters/Kham)





A worker returns home after work at Pha Rung shipyard in Vietnam's port city of Hai Phong, east of Hanoi October 4, 2016. (Photo by Reuters/Kham)





Commuters are seen during rush hour on a street in Hanoi October 10, 2016. (Photo by Reuters/Kham)





An employee (L) holds a smartphone as she is on the way to work at the Samsung factory in Thai Nguyen province, north of Hanoi, Vietnam October 13, 2016. (Photo by Reuters/Kham)





A woman checks coffee beans that are sorted by size at a coffee factory in Hanoi, Vietnam November 22, 2016. (Photo by Reuters/Kham)





Women work at a garment factory in Hai Duong province, outside Hanoi, Vietnam December 28, 2016. (Photo by Reuters/Kham)





People watch as Hoa Binh hydroelectric power plant opens the flood gates after a heavy rainfall caused by Talas typhoon in Hoa Binh province, outside Hanoi, Vietnam on July 20, 2017. (Photo by Reuters/Kham)





A couple takes a selfie as Hoa Binh hydroelectric power plant opens the flood gates after a heavy rainfall caused by Talas typhoon in Hoa Binh province, outside Hanoi, Vietnam July 20, 2017. (Photo by Reuters/Kham)





A man, helped by an other one riding a motorcycle, transports steel rods on a rickshaw as he makes way to deliver them to a construction site in Hanoi on June 8, 2016. (Photo by Hoang Dinh Nam/AFP Photo)





The floating market where many farmers make their livelihood selling produce in Nga Nam District, Soc Trang Province, Vietnam, May 18, 2016. The Mekong Delta, Vietnam's premier rice growing region, is suffering its worst drought since at least 1926, and saline water has swept farther up the delta than ever. (Photo by The New York Times)





The floating market where many farmers make their livelihood selling produce in Nga Nam District, Soc Trang Province, Vietnam, May 18, 2016. (Photo by The New York Times)





Shoppers walk past sale signs in a store window at the Aeon Co. mall in the Long Bien district of Hanoi, Vietnam, on Thursday, July 21, 2016. With a young population, an expanding middle class and one of Southeast Asia's fastest-growing economies, Vietnam is an alluring market for Aeon. The reason: China is slowing and growth is flat-lining at home. (Photo by Luong Thai Linh/Bloomberg)





In this Sunday, June 11, 2017, photo, a food vender walks under flying kites on Tam Thanh beach during an International Kite Festival in Quang Nam province, Vietnam. Hundreds of flying giant sea creatures, animal shaped and folklore inspired kites from 20 countries were taken to the sky. (Photo by Hau Dinh/AP Photo)





This picture taken on May 4, 2017 shows members of a dance club, mostly with retired people, dancing at Lenin park in downtown Hanoi. (Photo by Hoang Dinh Nam/AFP Photo)