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"Following medical evaluation and testing, he was found to have a blockage in one artery and two stents were successfully inserted," said Jeff Weaver, Sanders senior adviser, in a statement.

"Given that the downtrend in economic growth had largely eased by the end of the first quarter, the aggregate ROE of A-share companies has probably hit the bottom," said Xu Gao, chief economist at Everbright Securities Asset Management Co Ltd.

"From now on there will only be challenges, and I will always carry out bold reforms as a challenger," he said.

"For China, it is an appropriate time to be a bullet train manufacturer in the world market," said Yu Weiping, CRRC's vice-president.

"From human body X-rays to telemedicine and medical imaging, we are on the brink of entering a new age of artificial intelligence," said Mou Xiaoyong, president of United Imaging Healthcare.