Buildings often have impressive facades but hidden flaws can bring expensive disasters. Densely developed cities have strong demand for "infrastructure-building doctors" which use artificial intelligence (AI) technologies and robotics to find structural flaws – demand that Harris Sun, Chief Executive Officer and Founder of RaSpect, is eager to meet. The start-up improves on existing building inspections by using AI and cloud-based data analysis to build up models of the structures. This permits remote detection which saves costs and time. Being among the winners of a competition held as part of the Hong Kong Trade Development Council's (HKTDC) Start-up Express 2019 development programme, Mr Sun is looking forward to using the HKTDC's business-matching activities to expand overseas.