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What is the number of the world’s first polar scientific research icebreaker to obtain the smart ship classification notation?

Snow Dragon 2. The world's first polar research icebreaker "Xuelong 2" to obtain the smart ship classification notation is equipped with internationally advanced marine survey and observation equipment and is an important basic platform for my country to carry out polar marine environmental surveys and scientific research. Since it is a polar scientific expedition, it is necessary for the ship to be able to break through the ice. Our country originally had a polar scientific research ship, the "Snow Dragon", which was a former Soviet Arctic Ocean transportation and supply ship purchased from Ukraine. It was transformed into a polar scientific research icebreaker. But after many years, it can no longer adapt to the arduous tasks of our country's polar scientific expeditions. The Xuelong 2, delivered for use in July 2019, is my country's first self-built polar scientific research icebreaker. It is the world's first scientific research ship to adopt bow and stern bidirectional icebreaking technology. It has strong icebreaking capabilities and can Continuously breaks through the ice on the 1.5-meter-thick ice surface; it is highly intelligent. But there is still a gap with Russian icebreakers, which are nuclear-powered.