What does Shenzhen Yi Rui Optoelectronics do at Foxconn?

I know how to get to work in Longhua Foxconn D3, where Yi Rui Optoelectronics and Foxconn jointly set up an OEM workshop for Apple notebook screens. Million-class clean room, assembly line station operation. In the early stage, Yi Rui provided the backlight module technology, equipment and management, and in the later stage, it was managed by Foxconn, and assembled with Samsung /LG screens made by Foxconn, finally completing a complete display manufacturing. Foxconn provides human resources and pays wages. . .