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"For me, it became almost a very good mental processing time, just thinking about the day, thinking about the work," Weber said.

"Good policy and a happy life are my secrets of longevity," said Drolma.

"Going forward, we are eyeing more cooperation with African countries, and will try to connect with more academic organizations and companies. We will also work to develop new kinds of hybrid rice that are suitable for African countries and offer technical training to more local staff," Ma said.

"For example, senior directors at the Massachusetts Institute of Technology hosted a welcoming banquet in person; The University of California, Berkeley, played the Chinese national anthem and The East Is Red (another famous Chinese song) in honor of the delegation; The University of Texas learned the arrival of the delegation from newspaper and invited them for a visit and exchange," Sun said.

"Gone are the days when people used to define a life of good quality through possession of certain items or conspicuous logos," Jin said. "The new middle class see consumption not as a badge of honor but as a source of value."