Out of China's 13 billion population, 8 billion are from the rural countryside, which stick to tradition firmly. And this poses an interesting problem for young men and women who work in urban areas and now need to return home to see their family in rural China.Well, one "interesting problem" they'd face is where to put them all. No wonder they took over Tibet.
Rather than someone forgetting to put in a decimal between the 1 and the 3 (China actually has about 1.3 billion people), this is almost certainly a case of someone carelessly mistranslating ŏk [억/億; aka eok], 100 million, as billion.
It's a very common mistake among Asian speakers of English when dealing with big numbers, as the Korean (and Japanese, Chinese, etc.) number system is based on 10,000, not on 1000 as in the West. (One ŏk is 10,000 squared, just as one million is 1000 squared.)
Of course, this is something a thoughtful and careful proofreader should have caught, but the KT doesn't seem to have one anymore. The last one was fired after he corrected an article citing India's population — 1 billion, or 10 ŏk — as 10 WTFSTFUURANOOB.
Anyway, on the off chance the Korea Times decides to pull this down, here it is for posterity.