Pham Nhat Vuong, chairman of Vietnam’s largest private conglomerate Vingroup, has established Green and Smart Mobility Joint Stock Company (GSM), which offers VinFast electric cars and motorbikes for rental and taxi services. It will also provide taxi services itself using its own electric cars. VinFast electric motorbikes. Pham Nhat Vuong, chairman of Vietnam’s largest private conglomerate Vingroup, has established Green and Smart Mobility Joint Stock Company (GSM), which offers VinFast electric cars and motorbikes for rental and taxi services. It will also provide taxi services itself using its own electric cars.