Shares of EHang Holdings Ltd (EH) fell 5.28% in trading on Wednesday, despite the electric vertical take-off and landing (eVTOL) aircraft maker announcing a significant milestone for its international expansion plans.

EHang's EH216-S pilotless eVTOL aircraft completed its debut passenger flights in Thailand, marking the 18th country globally where the company has conducted flight operations. The flights took place at the Queen Sirikit National Convention Center in Bangkok, with permission from the Civil Aviation Authority of Thailand (CAAT).

While the successful demonstration flights represent progress in EHang's efforts to commercialize its urban air mobility solutions, investors may have concerns around the timeline and challenges of securing regulatory approvals and launching commercial operations in new markets like Thailand. According to the news release, EHang plans to conduct further flight tests in Thailand and aims to launch commercial flight operations in regions like Phuket and Koh Samui by 2025, subject to the CAAT's approval.