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"For smartphone users, it helps them kill spare time," he added.

"Having a target and a direction is important for developing business and careers. Sticking to the right direction and being patient is critical," he says.

"Free trade is self-evidently the lifeblood of the global economy, and we expect it to flourish," BHP CEO Mackenzie said in his address at the summit.

"For the government, it should not let the subsidy cut limit the development of the photovoltaic industry, as industry development is beneficial to low carbonization and improving the energy structure. It should support both distributed and centralized photovoltaic power stations, remove the subsidy gradually, ensure grid parity, and promote the conversion of power generation capacity."

"Generations of workers have not only created the miracle of turning barren land into a forest but also a precious spiritual fortune, the Saihanba spirit, which should be learned and carried forward," Liu said.