DIOSTECH Co., Ltd, formerly Tellus Co., Ltd., is mainly engaged in the development, manufacturing and sale of camera lens modules. Along with subsidiaries, the Company operates its business through three segments. The Optical Business segment is mainly involved in the production and sale of lens modules for mobile phone cameras. The Entertainment Business segment is engaged in the production of dramas and movies and the management of entertainers. The Other Service segment is engaged in the sale of cars and leasing businesses.