On March 20, China's A-share market saw mixed openings across its three major indices, while the optical module (CPO) sector experienced significant gains. All constituent stocks in the CPO index advanced, with Mingpu Magnetic Materials hitting the daily limit-up, Changguang Huaxin rising 9.53%, Tianfu Communication climbing 8.77%, Dekeli increasing 8.77%, and Xinyisheng gaining 6.27%.
CPO-focused stock Yuanjie Semiconductor Technology Co., Ltd. saw its shares reach 1,000 yuan, surging 18% to 1,122.34 yuan per share by 9:48 a.m., setting a new historical high. This milestone made it the eighth stock in A-share history to achieve a four-digit share price. The company's stock price surpassed that of Cambricon Technologies Corporation Limited, making it the second-highest-priced stock in the A-share market. Based on the closing price on March 20, 2025, the stock has accumulated nearly 690% gains over the past year.
Founded in 2013, Yuanjie Semiconductor specializes in independent research, development, production, and sales of semiconductor laser chip technology. Over the past decade, the company has developed laser chips supporting 2.5G, 10G, 25G, and higher data rates, becoming the first domestic manufacturer to master 25G laser chip production.
Historically, only seven other A-share stocks have reached or maintained share prices above 1,000 yuan, including Zhonganke, Kweichow Moutai, YunSai Intelligence, Cambricon Technologies Corporation Limited, Stone Technology, Hemi Technology, and Aimeike. Among these, Kweichow Moutai, Stone Technology, and Aimeike reached their peak prices in 2021, while Hemi Technology and Cambricon Technologies Corporation Limited achieved new highs in 2022 and 2025, respectively.
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