IPv4 is currently the most widely supported network protocol, where computers are identified by IP addresses. Theoretically, it can accommodate up to 2 32 2^{32} 2 32 network devices (IPv4: 8 hexadecimal digits). Unfortunately, these addresses have been exhausted, and it's truly a mystery how major ISPs allocate limited IP addresses to an infinite number of computers. IPv6 is far more impressive, with each address containing 32 hexadecimal digits, allowing for 2 128 2^{128} 2 128 network devices. These IP addresses will be more than sufficient before humanity perishes due to Earth's inability to sustain us. This protocol is championed by major internet companies including Google, DNSPod, and others. However, currently in China, IPv6 seems to be used only in universities,...