Changxin Technology, a leading A-share storage chip company, surged 9 points today and nearly hit the daily limit. The stock is just above 60 yuan, with a market cap of 40 billion, a turnover rate of 8.5%, and the main fund’s holdings have already reached 49%, putting it in a near-controlling position.

The logic behind this stock is solid. Changxin makes DRAM memory chips. This industry segment has long been monopolized by three companies—Samsung, SK hynix, and Micron—and the number of domestic enterprises that can do it is extremely limited. Changxin is currently the only manufacturer in mainland China capable of mass-producing DDR4 and DDR5, making domestic substitution highly certain. The company will release its interim report on August 29, so it’s normal for capital to front-run the move.

From the K-line chart, the stock started at around 34 yuan at the end of July and has now climbed to 60 yuan—almost doubling in less than a month. The moving averages are in a bullish alignment: MA5 is at 54, and MA10 is at 55. The short-term moving averages are still accelerating upward as they catch up. Trading volume expanded clearly today, with 3.82 million lots traded—much more active than the past few days.

For investors following semiconductors, storage is one of the most certain links in the AI computing chain. AI servers need memory capacities several times that of traditional servers, and demand for HBM and DDR5 continues to exceed expectations. Although Changxin hasn’t yet caught up to the process technology of SK hynix and Micron, it benefits from policy protection and supply-chain security advantages in the domestic market.

Of course, after the stock doubled in a month, chasing higher requires courage. With main-fund holdings close to half, chip concentration is high—so the rise can be fast, and the fall can also be fast. Volatility won’t be small before the interim report data is released.