What do the seven giants of China mean?

The seven largest enterprises in China. China VII occupies an important position in China's economy and is considered as one of the world's leading enterprises. Seven refers to the seven largest enterprises in China, including China Petrochemical Group, China Petroleum and Natural Gas Group, China Industrial and Commercial Bank, China Mobile Communications Group, China Bank, China Life Insurance (Group) Company and China Railway Engineering Corporation. These enterprises have great influence at home and abroad and have strong strength in their respective fields.