A worker measures steel components for pen tips at Taiyuan Iron and Steel (Group), or TISCO, in Taiyuan, North China's Shanxi province, Jan 10, 2017. China, the world's biggest manufacturer of ballpoint pens, has finally developed its own pen tips, ending a long-term reliance on imported ones. TISCO said it has mastered the production of steel components for pen tips after trying for five years. [Photo/Xinhua]