Proof of Work (POW for short) is a kind of consensus mechanism, which can be simply understood as a proof that you have done a certain amount of work, that is, I can know that you have completed the specified amount of work by looking at the work results. Work.

Bitcoin mining uses the proof-of-work mechanism. The Bitcoin network adjusts the calculation difficulty to ensure that each competitive bookkeeping requires miners to calculate for about 10 minutes before a result that meets the conditions can be calculated. The result is the random number contained in the "block header".

Proof of work means that if the miners find a result that satisfies the conditions, we can consider that the miners of the whole network have completed the workload of the specified difficulty coefficient. The probability of obtaining the right of bookkeeping depends on the proportion of miners’ workload in the entire network. If it accounts for 30%, then the probability of obtaining the right of bookkeeping is also 30%. Therefore, increasing the proportion of workload can improve competitiveness and obtain more newly born bitcoins.