下载 Blockchain Tutorial 为android

There are 4 stages for newbies to understand how food safety in Blockchain

Stage 1: It is to earn more than 1000 coins by playing simple game.
Stage 2: let users to buy given food product with use of earned coins
Stage 3: let users to find reasons why purchased food is contaminated ,looking through the history of the food product in blockchain , meaning one of good features is transparent.
During stage 3, user can see the history of food cannot be modified as strong feature of blockchain.
Stage 4: let user to experience the limitation of blockchain which is slow transaction
Basically, when user buy food, they need to wait for some period until the transaction is done.

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