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China experienced marked improvement in its surface water quality last year. According to the Ministry of Ecology and Environment, monitoring at 1,940 sites found that 71 percent of the water was at or above Grade III - a year-on-year improvement of 3.1 percentage points. Bodies of water listed below Grade V, the poorest quality, dropped by 1.6 percentage points to 6.7 percent.
China has alternative sources for imports; substitutions possible
China consumed 1.9 million metric tons of tea worth 235 billion yuan (.8 billion) in 2017, with imports of around 30 million kg worth around 0 million coming mainly from Sri Lanka, Kenya, Uganda and Vietnam, industry data showed.
China has become the largest trade partner of the United States, while the US is China's second largest. Bilateral trade surged to 9.6 billion in 2016 from .5 billion in 1979 when the two countries established diplomatic ties.
China has a long history of irrigation, and has fine-tuned its technologies over the years, he said.
来源：资阳报