On 16 February 2023, CNERC-Rail invited Prof. Hai Guo and Prof. Alessandro Stocchino to deliver lectures on Collaboration Research Fund (CRF) projects. Prof. Hai Guo gave an academic seminar entitled “Is the Usual Social Distance Sufficient to Avoid Airborne Infection of Expiratory Droplets in Indoor Environments”. Prof. Alessandro Stocchino gave an academic seminar on Hong Kong coastal HF-radar network. Members of the CNERC-Rail have discussed with two professors on possible future collaborations.