French President Francois Hollande delivers a speech at Hanoi's National University on September 6, 2016. Hollande is in France's former colony Vietnam to meet political and business leaders in a bid to boost ties with one of southeast Asia's fastest growing economies. / AFP PHOTO / POOL / HOANG DINH NamHOANG DINH NAM/AFP/Getty Images

French President Francois Hollande delivers a speech at Hanoi's National University on September 6, 2016. Hollande is in France's former colony Vietnam to meet political and business leaders in a bid to boost ties with one of southeast Asia's fastest growing economies. / AFP PHOTO / POOL / HOANG DINH NamHOANG DINH NAM/AFP/Getty Images

French President Francois Hollande (2nd L) prepares to pose with some students after he addressed an audience at Hanoi's National University on September 6, 2016. Hollande is in France's former colony Vietnam to meet political and business leaders in a bid to boost ties with one of southeast Asia's fastest growing economies. / AFP PHOTO / POOL / HOANG DINH NamHOANG DINH NAM/AFP/Getty Images

France's President Francois Hollande attends a welcoming ceremony at the Presidential Palace in Hanoi on September 6, 2016. Hollande is in France's former colony Vietnam to meet political and business leaders in a bid to boost ties with one of southeast Asia's fastest growing economies. / AFP PHOTO / POOL / KHAMKHAM/AFP/Getty Images

France's President Francois Hollande (L) and Vietnam's President Tran Dai Quang (C) are guided by Vietnamese protocol officer Mai Phuoc Dung during a welcoming ceremony at the Presidential Palace in Hanoi on September 6, 2016. Hollande is in France's former colony Vietnam to meet political and business leaders in a bid to boost ties with one of southeast Asia's fastest growing economies. / AFP PHOTO / POOL / KHAMKHAM/AFP/Getty Images

Vietjet CEO Nguyen Phuong Thao (R) shakes hands with Airbus Commercial CEO Fabrice Bregier (2nd L) after a signing ceremony as France's President Francois Hollande (back L) and Vietnam's President Tran Dai Quang (2nd R-behind) look on, at the Presidential Palace in Hanoi on September 6, 2016. Hollande is in France's former colony Vietnam to meet political and business leaders in a bid to boost ties with one of southeast Asia's fastest growing economies. / AFP PHOTO / POOL / KHAMKHAM/AFP/Getty Images

Vietnam Airlines general director Duong Tri Thanh (R) and Airbus Commercial CEO Fabrice Bregier (2nd L) exchange signed contracts as France's President Francois Hollande (L) and Vietnam's President Tran Dai Quang (2nd R) applaud during a signing ceremony at the Presidential Palace in Hanoi on September 6, 2016. Hollande is in France's former colony Vietnam to meet political and business leaders in a bid to boost ties with one of southeast Asia's fastest growing economies. / AFP PHOTO / POOL / KHAMKHAM/AFP/Getty Images

Jetstar Pacific CEO Le Hong Ha (R) and Airbus Commercial CEO Fabrice Bregier (L) prepare to exchange signed contracts as France's President Francois Hollande (2nd L) and Vietnam's President Tran Dai Quang (2nd R) applaud during a signing ceremony at the Presidential Palace in Hanoi on September 6, 2016. Hollande is in France's former colony Vietnam to meet political and business leaders in a bid to boost ties with one of southeast Asia's fastest growing economies. / AFP PHOTO / POOL / KHAMKHAM/AFP/Getty Images