So, during the pandemic, that is a life and death question for the Taiwanese people, because on one hand, we want to receive exposure notification, if we enter a venue that has infected people. On the other hand, nobody wants the government, or even the venue owner to know my telephone number. So, this is the dilemma everybody was struggling with. And again, the GovZero community, g0v, created this zero-knowledge way of contact tracing.