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Billboards advertising the 12th National Congress of the Communist Party of Vietnam are displayed in Hanoi, Vietnam, on Tuesday, Jan. 26, 2016. Vietnam's new leadership is starting to take shape after days of behind-the-scenes sparring at a Communist Party congress, with the biggest beneficiary the General Secretary Nguyen Phu Trong, potentially signaling a more cautious approach to economic reform. Photographer: Maika Elan/Bloomberg via Getty Images

Billboards advertising the 12th National Congress of the Communist Party of Vietnam are displayed in Hanoi, Vietnam, on Tuesday, Jan. 26, 2016. Vietnam's new leadership is starting to take shape after days of behind-the-scenes sparring at a Communist Party congress, with the biggest beneficiary the General Secretary Nguyen Phu Trong, potentially signaling a more cautious approach to economic reform. Photographer: Maika Elan/Bloomberg via Getty Images

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Propaganda poster celebrating the 12th party congress

Propaganda poster celebrating the 12th party congress

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HANOI, VIETNAM - FEBRUARY 05: Veiled woman passing by propaganda posters of the communist party fenced with wire, hanoi, Vietnam on February 5, 2011 in Hanoi, Vietnam.

HANOI, VIETNAM - FEBRUARY 05: Veiled woman passing by propaganda posters of the communist party fenced with wire, hanoi, Vietnam on February 5, 2011 in Hanoi, Vietnam.

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William Wong, chairman of Formosa Plastics Group, speaks during a shareholders' meeting in Taipei, Taiwan, on Monday, June 20, 2011. Formosa Petrochemical Corp. plans to shut its No. 3 naphtha cracker at Mailiao, Taiwan, for planned maintenance in August and has not fixed a schedule for the resumption of its No. 1 unit at the site. Photographer: Maurice Tsai/Bloomberg via Getty Images

William Wong, chairman of Formosa Plastics Group, speaks during a shareholders' meeting in Taipei, Taiwan, on Monday, June 20, 2011. Formosa Petrochemical Corp. plans to shut its No. 3 naphtha cracker at Mailiao, Taiwan, for planned maintenance in August and has not fixed a schedule for the resumption of its No. 1 unit at the site. Photographer: Maurice Tsai/Bloomberg via Getty Images

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A Formosa Plastics Corp. employee walks past the company's No. 6 naphtha cracker plant in Mailiao, Taiwan, on Thursday, Jan. 21, 2010. Formosa Plastics Corp. Chairman Lee Chih-tsuen said the market for his company's petrochemicals in the first half "looks OK" partly because some rivals based in the middle east are short of natural gas, used as a raw material. Photographer: Maurice Tsai/Bloomberg via Getty Images

A Formosa Plastics Corp. employee walks past the company's No. 6 naphtha cracker plant in Mailiao, Taiwan, on Thursday, Jan. 21, 2010. Formosa Plastics Corp. Chairman Lee Chih-tsuen said the market for his company's petrochemicals in the first half "looks OK" partly because some rivals based in the middle east are short of natural gas, used as a raw material. Photographer: Maurice Tsai/Bloomberg via Getty Images