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"Given that Taiwan leader Tsai Ing-wen and her party are now explicitly seeking better relations with the US, Beijing needs to be on high alert for US interactions with Taiwan," Zhu said.

"Fortunately, the layers of strata in the cave are little disturbed and basically remains as they were," she said. "We can thus build a timeline of the cave dwellers."

"Freedom Over Texas," Houston's annual Fourth of July celebration, will be held without public activities or public access due to the continued fast spread of the coronavirus.

"For me CEO has a different meaning -- Chief Education Officer," he joked.

"For us, the technological innovation and application of the AI algorithms are the key weapon against the information overload," said Li, also a partner of Zhihu.