Prime Minister Narendra Modi on Tuesday said work is on to issue chip-based e-passports to Indian citizens under a centralized passport system. "Our embassies and consulates are being connected to the Passport Seva Project worldwide," he said addressing the inaugural ceremony of Pravasi Bharatiya Divas (PBD) 2019 here. Prime Minister Narendra Modi on Tuesday described NRIs as India's brand ambassadors and said they were the symbols of the country's capabilities. The prime minister was inaugurating the 15th Pravasi Bharatiya Diwas convention in his parliamentary constituency Varanasi.