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"Every six to eight months, a new round of tightening measures needs to be adopted. Otherwise, the effects would soon weaken, as demand is still strong," said Zhang Hongwei, chief researcher with Shanghai-based real estate consultant firm Tospur.

"Even though we received a denial order, we will still follow the standard of export control compliance for the world's first-class companies,"he said.

"Each experiment took a whole 24 hours, and we would adjust our experimental program constantly. It is a process of trial, feedback, and progress. One needs to keep concentrating hard during the 24-hour experiment, and I would ignore other staffs' conversation if they were not experiment-related."

"Few other countries have a transparency index for foundations such as China," he said.

"Escalators are one of our core products and our escalator factory in China serves global markets. The upgraded Otis escalator factory underscores our confidence in the China market," he said, adding that the group is committed to continue meeting the needs of its customers in China, the world's largest elevator market.