What does Tsingshan do?

Can you tell me more about Tsingshan? I'm curious about their operations and what specific services or products they offer. Are they known for a particular industry or market niche? Do they have a significant presence globally, or do they primarily operate within a specific region? Additionally, what sets Tsingshan apart from other companies in their field, and how do they maintain their competitive edge? I'd appreciate any insights you have on the company's mission, vision, and overall goals.