The work included electromechanical devices, some of the guards' rooms and the reception hall in the five-story building, according to company officials.
The yuan weakened to above 7 per dollar for the first time in more than a decade last week, after Washington's threat to slap 10 percent tariffs on an additional 0 billion of Chinese goods starting Sept 1.
The zone is a wetland reserve dedicated to the protection of the salt-tolerant mangroves, which can endure the harsh conditions at the seaside.
The yuan started to rise on Monday, after the two sides agreed on Feb 15 to hold a new round of economic and trade talks in Washington in the past week following the meeting in the previous week in Beijing, which both sides said had led to some progress.
The worst-case scenario would be for these reductions to be made permanent, as cash-strapped transit agencies did during the Great Recession, he said, adding, "Once you do that, riders change their plans, and they don't really come back."
The zone announced the list for the second group of Hummingbird Enterprises last Friday, a program to nurture quality cultural companies with strong potential and competitiveness. They are expected to be listed companies or industrial leaders in the future.
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There are no immediate reports of damage or casualties.
Their discussions related to environmental pollution testing, alternative energy sources, water pollution, soil management and air quality testing and treatment.
The yuan also rose strongly against the dollar in offshore markets on Wednesday, hitting the highest level in 14 months. The yuan has risen by about 5 percent against the dollar since the start of the year.
Their Derung ethnic community is located in one of the most remote parts of the country, but that has not stopped the anti-poverty measures from investing in education to attract young teachers and keep classes up to standard, he says.