A more than 40 per cent slump in Chinese humanoid robot maker Unitree Robotics since listing has sounded regulatory caution for the industry, with speculation swirling that Beijing may tighten approval of the peer listings. The regulators would heighten scrutiny over humanoid makers seeking initial public offerings (IPOs) on the mainland’s exchanges, according to media reports. The sustainability of revenue growth, earnings prospects and applicants’ key capabilities of tech innovation would be...