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Bezos?said in 2017 that he was selling billion a year to fund his Blue Origin space venture, but he has been increasing the size and frequency of the stock sales. He?sold .8 billion worth of Amazon stock a year ago.

Besides, in terms of talent and human resources, the modern marketing scene has been overly commercialized. So-called marketing whizzes are paid obscene amounts of money to promote certain products or viewpoints. In many such instances, authenticity will likely be compromised or lost altogether.

Biegun noted that "such an action will be most unhelpful" in achieving the permanent peace on the peninsula.

Besides archival research, panda experts who contributed to the chronicle have carried out extensive field research in cities and counties in Sichuan, including Ya'an, Baoxing and Tianxing.

Biden, 77, served as vice president from 2009 to 2017 to then President Barack Obama. Kerry was the Obama administration's secretary of state from 2013 to 2017.