For years, Kweichow Moutai has reigned as the undisputed 'Stock King' of China’s A-share market, its soaring share price serving as a proxy for the nation’s consumption-driven growth. That symbolic order was upended this week as Lianxun Instrument, a specialist in optical chip testing equipment, surged past the luxury distiller to claim the highest share price on the mainland. At its intraday peak, Lianxun hit 1,361 RMB per share, eclipsing Moutai’s 1,327 RMB and signaling a profound shift in investor sentiment toward high-end domestic technology.
Lianxun’s ascent is not an isolated event but rather the latest in a series of 'hard tech' challengers emerging from the STAR Market, China’s NASDAQ-style board. Companies like Cambricon and Yuanjie Technology have also briefly seized the price crown recently, reflecting a market that increasingly prizes AI infrastructure over traditional consumer staples. While Moutai remains a titan by total market capitalization, the battle for the most expensive single share is now being fought on the frontiers of semiconductor testing and high-speed data transmission.
Founded in 2017, Lianxun has rapidly positioned itself as a critical node in the global AI supply chain. It is one of the very few companies globally—and the first in China—capable of providing core testing instruments for 400G, 800G, and next-generation 1.6T optical modules. These modules are the essential conduits for data within AI data centers, and Lianxun’s ability to service the entire pipeline from wafers to chips has made it a darling of institutional investors seeking 'bottleneck' technologies.
The company’s financial performance supports its aggressive valuation, having successfully executed a turnaround from losses in 2023 to a projected quintupling of net profit in early 2026. Its client roster reads like a who’s who of the tech world, including global telecom leaders like Lumentum and Coherent alongside domestic giants like BYD and Luxshare. As Beijing pushes for self-reliance in the semiconductor sector, Lianxun has become a primary beneficiary of the 'domestic substitution' trend that is reshaping Chinese capital markets.