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"Dunhuang culture is a blend of Chinese, Indian, Greek, and Islamic culture, which is of great value for research and requires careful preservation. Dunhuang was once a major stop on the ancient Silk Road networking trade routes that connected the East and West," Zhang added.

"Delta will have to be a smaller airline as we adjust to reduced demand and the need for distancing and safety during travel," Delta CEO Ed Bastian, told employees in a memo. "A smaller Delta unfortunately means fewer people will be required."

"Elements of San Antonio are included, but at the same time, we want to blend it with things that are culturally appropriate to Nanjing," Andrews said.

"Each of them has found a way to survive against the odds of changing competition, climate and environmental conditions," Wheeler explained, "so each can teach us something really worth knowing as we face an uncertain environmental future ourselves."

"Fast-growing internet technologies not only accelerate development of new internet businesses but also result in many new problems, such as whether we can pay using digital currency and how to prevent privacy infringement while collecting personal information," he said.