And the link goes to, of course, a locked Teclast forum post (use Chrome browser to translate).
Previously here:
Teclast Releases tOS
Photos: tOS On Teclast X98 Air 3G
Teclast: tOS For X98 Air 3G
Teclast P98 Air: tOS OTA Upgrade
Teclast tOS Promo Site
Official Video: Teclast OS Demo
Teclast Announces Its Own OS