On April 3, Lenovo Group announced that “Silk Aluminum” 5L52, which was jointly developed with Chinalco Ruimin, passed the national standard approval and became a new national standard brand. It is expected to be used by 8 million Lenovo notebooks this year. Before the birth of the “silk aluminum” material, the aluminum and magnesium alloy plate brands in GB/T 3190 Standard, which were based on the material numbering of former Soviet Union, the United States and Japan, had been used for decades. The new self-developed aluminum material – “Silk Aluminum” 5L52 was numbered into the GB/T 3190 National Standard, becoming the first new national standard brand for Chinese original aluminum alloy plate in the 3C field.