My name is **RenFei(任霏)**, and I'm a Java programmer from Mainland China.
## Navigation
### My Personal Website and Blog
If you speak Chinese, welcome to visit my blog: [www.renfei.net](https://www.renfei.net), which includes many useful tools for developers.
### BT(BitTorrent) Tracker Service
I run a public BitTorrent Tracker server: [http://tracker.renfei.net:8080/announce](http://tracker.renfei.net:8080/announce), which assists in communication between peers using the BitTorrent protocol, helps speed up BitTorrent downloads.
### Internet IP Address Query Service
Since the network may use multi-layer NAT address translation, IP address query for Internet egress:
* [ip.renfei.net](http://ip.renfei.net) : IPv4 and IPv6, IPv6 is generally preferred, depending on the DNS resolution of the client.
* [ipv4.renfei.net](http://ipv4.renfei.net) : IPv4 Only.
* [ipv6.renfei.net](http://ipv6.renfei.net) : IPv6 Only.
### My Personal Website and Blog
If you speak Chinese, welcome to visit my blog: [www.renfei.net](https://www.renfei.net), which includes many useful tools for developers.
### BT(BitTorrent) Tracker Service
I run a public BitTorrent Tracker server: [http://tracker.renfei.net:8080/announce](http://tracker.renfei.net:8080/announce), which assists in communication between peers using the BitTorrent protocol, helps speed up BitTorrent downloads.
### Internet IP Address Query Service
Since the network may use multi-layer NAT address translation, IP address query for Internet egress:
* [ip.renfei.net](http://ip.renfei.net) : IPv4 and IPv6, IPv6 is generally preferred, depending on the DNS resolution of the client.
* [ipv4.renfei.net](http://ipv4.renfei.net) : IPv4 Only.
* [ipv6.renfei.net](http://ipv6.renfei.net) : IPv6 Only.