TGIC(The global index chain) is a decentralized global index service trading platform based on block chain. It exists to break The traditional financial pattern and exchange control and The index trading platform. The index is the index of the change of the total price level of various markets, and the index is one of the most valuable investment products. In the financial market, the significance of the index is extraordinary, but as a general investor, we can only look at the index, or purchase fund products to participate in it. TGIC will use the block chain technology to break this angry pattern.