There will always be solutions to these things. Worry doesn't make us good in dealing with bitcoin. It will only spread FUD and will makes us poor in understanding things the way they could probably work. Should they ban bitcoin then there are so many other miners that could do the same work in some other countries. Who knows even cellphones can be used to mine bitcoin in the future without problems.

for some reason you are just making the assumption that China has banned bitcoin mining and then based on that you make another assumption that there is this law that jails people who break that ban!
there was no ban and there is no such law. and people are continuing to mine in China as before. all of this was a drama started a couple of days ago due to the bitcoin price rise and the fact that some people weren't done accumulating and wanted the price to come back down. they failed.

It's difficult to say correctly anything about that. There is two thing will happen if China ban this then others companies or other countries find the another way to recover this. And another thing is if China ban this then maybe bitcoin hashrate will drop because China has capture huge market of this so it's maybe happen.

Eventhough China are one of the largest minners here in this world;  they can still replace by someone else if the china will banned bitcoin.  Therefore the hashrate will drop but in just a short period of time. Once there is a new country who continues the job which left by china it will rise once again;  so you should not to worry about.

first of all that picture is from 2011 (8 years ago!) and it is not reliable. secondly it is reporting the "average" electricity cost not the exact one. in many countries there is a wide range of electricity cost, in some places it is very cheap while in other places inside the same country it can be extremely higher. so you can't really decide based on that!

First, China very extraordinary, China was able to defeat the United States from the economy sector. including in the world of Bitcoin and Crypto.
second, the climate of bitcoin users in China is actually quite dynamic and conducive.
third, China has a major contribution to Bitcoin mining. when BTC reaches 20K, BTC mining in China is considered a factor affecting the bullish market.
fourth, 80% of BTC mining is influenced by the state of China. what if the percentage is lost or decrease? of course, will affect the hash rate of BTC.

Is China planning to block bitcoin because of electricity problems? or is there another reason? isn't China pro on the blockchain but counter to crypto? if it really happens then this is like a disaster because half of the network is probably located in China

It seems what you like to say is this. What will happen it China bans bitcoin mining? That should be the proper question and topic.

Anyway, the leading mining company that has a huge mining data center and is the number one producer of bitcoin mining hardware across the globe is bitmain. They are selling antminer and the recent miner they are selling is the T9. But lets go back to the topic. If China will ban bitcoin mining it does not mean that  Chinese bitcoin miner especially bitmain will stop mining. They will just relocate their company along with their hardware to other parts of the world. Bitmain have already earned hundreds of millions from this trade they will not stop even in the face of bitcoin mining ban.

there is some assumption that it is because of the plan of china to introduce their own cryptocurrency but an article came out that the possible reason is to save an environment and seriously wasting resources.
https://www.engadget.com/2019/04/10/china-ban-bitcoin-mining-wasted-resources/
https://qz.com/1590655/chinas-proposed-ban-on-bitcoin-mining-is-about-the-environment-and-capital-flight/

Though I am more inclined to agree with this article :
https://medium.com/datadriveninvestor/why-is-china-banning-bitcoin-mining-on-may-7-81a95f6884a7

I believe that China does not approve bans on Bitcoin in the future. Because many countries now start accepting and protecting Bitcoin. China is an economic powerhouse, and they will soon catch the size of society instead of ignoring it. I believe this will be an excellent opportunity for Crypto investors in this country soon after China accepts Bitcoin.