In 2019, the admiral Morio de l'Isle warned the National Assembly about a high number of marriage between Chinese women and French serviceman in Brest, which host the general staff of the Strategic Oceanic Force, responsible for the sea-based French nuclear deterrence, and located next to Île Longue, the home base of French SSBN. He also notified of an "increasingly strong" Chinese presence around VLF military transmission center across France citing the example of the creation of "sino-european hub" funded by the investment company of Beijing Municipality in a remote town near the HWU transmitter. This choice was described by a local deputy as "troubling".
