FIFA, 3 Jun (Xinhua)-- as of 1 June, the total size of Science and Technology Innovation Board index products at home and abroad has increased to 112.9 billion yuan. Among them, the total scale of domestic and foreign products of Kechuang 50 Index has reached 104.4 billion yuan. Recently, the scale of Kechuang chip index products has increased rapidly to 7.1 billion yuan, and the scale has increased by more than ten times since the beginning of this year. Since May, the net inflow of Science and Technology Innovation Board Index products has continued to exceed 20 billion yuan.