CIG's stock price surged 5.08% at the market open, reflecting significant investor interest during the intraday session.

The rally was primarily driven by the company's exceptionally strong first-quarter financial performance. CIG reported Q1 revenue of RMB 1.287 billion, representing a 43.98% year-over-year increase, while net profit attributable to shareholders skyrocketed 276.44% to RMB 118 million. This earnings beat was fueled by robust global data center demand for the company's 800G and 1.6T high-speed optical modules.

Furthermore, favorable industry dynamics provided an additional catalyst. Analysts highlight a widening supply-demand gap for indium phosphide chips, creating a pricing tailwind for optical components. This industry-wide optimism was reflected in broader sector gains, with several peers in the optical communications space also trading higher.