Has China's Tsingshan $1 BLN steel plant in Zimbabwe starts production?

Could you provide some insight into the recent announcement that China's Tsingshan steel plant, valued at $1 billion, has commenced production in Zimbabwe? How significant is this investment for both countries, and what impact could it have on the global steel market? Additionally, what challenges might the plant face in the coming years, and how does it align with China's economic strategy in Africa?