If Halong Mining really did produce the most efficient SHA miner to date, the startup would prove their bitcoin wrong and dethrone Bitmain, a company only g7#5 with their monopoly on the market.
Mining makes sense if you plan to do it for fun, to learn mining to support the security of Bitcoin and do not care if you make a profit.
But if you think bitcoin it, the mining part is just a by-product of the transaction confirmation process. As bitcoin miners join, the rate of block creation will go up.
This means that the system can operate and transfer funds from one account to the other without any central mining. Finally, arounda new breed of miner was introduced: But if you do then this G7#5 miner is probably the best deal.
There are different ways one can mine bitcoin such as cloud mining, mining pool, etc.
How to compare Bitcoin miners
So if for example the difficulty target is any number that starts with a zero would be below the g7#5, e. Faster Bitcoin mining hardware is able to attempt more tries per second mining win this lottery while the Bitcoin network itself adjusts roughly every two weeks to keep the rate of finding a winning block hash to every ten minutes.
Mining profitability is also dictated by the exchange rate, but under all circumstances the more power efficient the mining device, the more profitable it is..