Why don't domestic movies have high definition?

A group of people don't know what to say. There are high-definition RMVB and mkv on the Internet on the premise that Blu-ray discs come out, and then someone compresses and encapsulates the contents of the discs to get these high-definition resources. China supported HD-DVD during the dispute over the next generation format of DVD, but HD-DVD was eliminated by Blu-ray, and China was unwilling to accept Blu-ray (now China HD). Meanwhile, the Blu-ray camp is uneasy about piracy in China. In the last DVD era, due to the ultra-low cost of domestic DVD players, it was unprofitable for western manufacturers to produce DVD players. In order to win Blu-ray, Sony sold the PS3 at a loss and posted billions, but the money has not been earned back. So this time the Blu-ray camp is very wary of China. Both sides are unwilling to accept each other, so domestic films are not shown on Blu-ray discs, which makes the market at a loss. The prices of foreign Blu-ray disc players and Blu-ray discs have dropped rapidly, but the domestic prices have remained high, further affecting their popularity. Few people are willing to buy Blu-ray discs (price is a factor, and rampant piracy is also a factor. There are few pirated copies in Europe and America, and the market is big. Of course, film manufacturers are diligent in producing Blu-ray discs. Producers can't recover their costs without a certain amount of sales, which makes domestic films reluctant to release Blu-ray discs. There are no Blu-ray discs, only DVDs, and of course you can't see the HD version online.