CIG shares surged 5.57% in intraday trading on Thursday, reflecting a strong rally in the optical communication sector.

The stock's upward momentum was driven by the dissipation of concerns over a proposed US FCC ban on importing Chinese optical transceiver modules, with multiple institutions noting that Chinese manufacturers' dominant global capacity makes the ban impractical. Additionally, the completion of the controlling shareholder's share reduction plan on August 6 removed a key overhang that had weighed on investor sentiment. Market confidence was further bolstered by the company's upcoming board meeting on August 24, which will review interim results and consider an interim dividend proposal.

The broader optical communication sector also strengthened, with peer ZJ Innolight rising 5.95% and YOFC gaining 4.26%, further lifting sentiment and supporting CIG's share price increase.