The TAs from Lvl 76 can be accepted daily from 0:00 to 23:59.
You can also hand them in the next day, re-log or port them and then accept them again for this new day.
Tagesquest Level 15-40
Accept Sikong Wuzhi
Complete Sikong Wuzhi
Solution talk to Sikong Wuzhi
Reward MP and HP Regeneration +10, for 1h (cannot be combined with other effects)
Accept Sikong Wuge
Complete Sikong Wuge
Solution talk to Skiong Wuge
Reward double the experience for 1h