SHIJIAZHUANG - A 6th-generation flexible AMOLED display screen production line, which involved an investment of nearly 30 billion yuan ($4.7 billion), went into operation Thursday in North China's Hebei province.

The production line of Visionox Co in an industrial park in Langfang City, South of Beijing, can meet the demand of nearly 100 million smartphones for high-end screens.

Visionox, which has more than 3,500 OLED patents, grew out of the OLED project team of Tsinghua University. It was the first Chinese firm to participate in the formulating of the global flexible display screen standard, according to Visionox president Zhang Deqiang.

The production line is expected to start mass production in the second half of the year with a monthly production of 30,000 glass substrates (1,500mm by 1,850mm).

Chinese firms previously relied heavily on imports for high-end display products, such as curved and foldable screens.