In a hotel lobby on Hong Kong Island, a delivery robot pauses outside one of the lifts as the doors open, and a guest steps out. The robot waits, and then rolls neatly inside. The move looks simple, but it isn't. To work in the busy hotel, owned by an international chain, the robot must navigate a building that won't slow down for it. People often get in the way, and it must take the lift to the correct floor and find the right room. The company behind the robot, Yunji, is a mainland Chinese tech business aiming to use Hong Kong as a springboard for successful overseas expansion.

We aim to make our product succeed in Hong Kong, and then expand outward, says the firm's vice-president, Xie Yunpeng. Hong Kong is increasingly important for mainland Chinese tech companies to raise money, test products, and build credibility for overseas expansion. This shift comes as US and European nations grow wary of Chinese companies, often viewing them through the lens of 'China risk', as countries express concerns over state-led espionage and domination of the tech sector.

As a result, access to capital and customers has become more challenging for Chinese firms abroad, prompting them to look towards Hong Kong. The number of mainland firms listing on the Hong Kong Stock Exchange significantly surged in the past year, increasing to 76 listings from just 30 the previous year.

Hong Kong is fashioning itself as a connector to the outside world for Chinese companies, with a focus on speeding up share flotations and aiding mainland businesses in setting up operations in the city. This strategy aligns with Beijing's goal for more 'technology self-reliance' amidst rising geopolitical tensions.

However, challenges remain for these firms. Even if they find success in Hong Kong, barriers still linger overseas, including heightened scrutiny from governments in the US and Europe due to national security concerns regarding data security and cybersecurity risks.

Despite these challenges, Hong Kong still offers a unique opportunity for mainland Chinese tech firms to position themselves as viable global players, away from the constraints of the mainland market.