What should we do now, other than what we have achieved? Mehrotra said the additional rate for PC flash drives in 2017 is about 35 percent, and will increase to 75 percent by 2020. And "a lot of hard drives still need to be replaced by SSDS... Future self-driving vehicles are expected to be equipped with about 40GB of DRAM... This will also drive the use of NAND flash memory." I've been trying to get a refund because I collected more money and was turned down. It claims that I have been charged with the "cheapest" fare, although it admits that the price of the app is not correct. So now that it is the end of the year, it is a good time to reflect on what we have done to achieve these goals. Block chain can create a world in which all requirements were met, everyone can express their own points of view, we can take meaningful global cooperation, can benefit through different experience.