They just check whether you are an adult. But in many countries, if you do the age signaling online, the issuing ministry receives something that shows that somebody like you is trying to prove your age to an alcohol vendor. This is bad because nobody wants to be tracked all the time. There are some jurisdictions that make the citizen transparent to the state, but in Taiwan, we want to make the state transparent to the citizen, not the other way around. When we make the verifiable credential, we take extra care so that when presenting it, it doesn’t even need an internet connection. It’s not pinging back.