CATL shares climbed more than 5% during midday trading.
The stock bucked a downward trend in the broader Hong Kong market as the Hang Seng Index fell.
This rally followed the successful implementation of a major energy storage project in Bulgaria.
CATL developed the 601 MWh battery energy storage system (BESS) in partnership with Solarpro.
The milestone underscores the company's expanding execution capabilities within the global energy storage market.