why is there so many cryptocurrencies Block

7 days and 6 boards: construction industry.First, the concept of robotFourth, the digital economy

2 boards: China Research Institute and Walter.7 days and 6 boards: Shanzi Hi-Tech.3 days and 2 boards: Easyhome, Smith Barney.

Fourth, the digital economy5 days and 4 boards: Ningbo Jingda.5 days and 4 boards: overpass lifting.