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"Generally, the number of tourists allowed on a glass walkway is far less than the design limit," said Li Yunsheng, an engineering teacher at Shijiazhuang Tiedao University, who helped draft the standards.

"Getting married later is a common phenomenon in the world. China is no exception with rising age at first marriage," said Zhang Juwei, a demographer with the Chinese Academy of Social Sciences.

"Having a narrative about where you're trying to get to and the organization you're trying to become is the first step toward driving change," said Scott D Anthony, Singapore-based senior partner at consultancy Innosight in the report.

"From the very beginning, our goal has been to achieve commercialization of the technology, and the improved average output is a key determinant and will accelerate commercial production in the future," Mi said.

"For us, physical bricks will always be at the center. When kids come to toy stores, magic happens. We can use digital channels to enhance that, but we always know it all starts with a brick," he said.