The number of locusts per hectare has dropped 75 percent in areas where the chickens have been foraging. About 100 of the birds won the battle last year over an area of 534 hectares in Wushi where locusts had been rampant, Yang added.
The number of online orders for meals, snacks, vegetables, fruits and drinks reached 10.96 billion, which nearly doubles year-on-year, according to the report issued by Analysys, an internet data analysis service provider.
The numbers in Seoul and its adjacent Gyeonggi province came to 590 and 606 each.
The notice also said the committee should develop overall plans for the expo, including implementations, and coordinate specific tasks during in preparation for the annual event.
The next oldest — two incisor teeth believed to be from a Homo erectus in Yuanmou in South China — are 1.7 million years old.
The official CPI is due to be released by the National Bureau of Statistics on May 10.
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The number of micro-credit firms dropped by 237 in 2016 compared with 2015.
The observatory also mentioned grassland in Inner Mongolia, and asked authorities to closely monitor sources of ignition and ensure the safety of forests.
The number of rural clinics was down by 6,000 last year, the report said.
The objective of moving to a negative list, Huang said, is "a very good idea" and gives "greater clarity to foreign investors."