In this task, you're given an article and an answer. Your task is to generate the question for the answer based on the given article.
One example: Article: There are a lot of public libraries in Britain. These libraries have more than one hundred and fifteen million books, not including those libraries of public schools. Public libraries not only lend books, music records but also help children, patients in hospitals and others to get special play readings, film shows and so on. The first public libraries were founded in about the year 1850. Today's public libraries usually have a reading-room, a lending room and a reference room. The greatest and most famous library in Britain is that of the British Library in London. It was founded in 1973 and has over 10, 000, 000 books. It has nearly every magazine, newspaper and book published in Britain and other parts across the world.
Answer: 10,000,000 or less.
Solution is here: How many books are there in the British Library?
Explanation: In the Article, 10,000,000 is mentioned for the number of books available in the British Library, so this is a good question.

Now, solve this: Article: First direct coal liquefaction line produces (Xinhua) HOHHOT - China's first direct coal-to-oil project, operated by the country's leading coal producer, Shenhua Group, produced 866,000 tons of oil products last year. The direct coal liquefaction line is located in Ejin Horo Banner , Ordos city, North China's Inner Mongolia autonomous region. It produces 3,000 tons of oil products by using nearly 10,000 tons of coal per day, said Shenhua Coal Liquefaction and Chemical Co.,Ltd. With an investment of 12.6 billion yuan ($2.06 billion), Shenhua Group began construction of the project in 2004, using self-developed technologies. The project began trial production at the end of 2009 with a designed annual capacity of 1.08 million tons of diesel , naphtha and liquefied petroleum gas . Proven coal reserves around Ordos are estimated at 160 billion tons, or 11.4 percent of the country's total coal reserves. As part of its clean energy strategy, China has begun a number of direct or indirect coal liquefaction and coal gasification projects in Inner Mongolia, Shaanxi, Ningxia, Xinjiang and Liaoning in the past three years.
Answer: The proven coal reserves around Ordos.
Solution:
What's mainly talked about in the passage?