I discovered jiaogulan (amachazuru in Japanese; literally "sweet tea vine") soon after moving to Thailand and used to drink a lot of it. It definitely puts wood in the pencil and is calming for me and, unlike ginseng, doesn't make me aggressive and prone to anger outbursts. I can even drink it at night and still sleep normally, no, even better than usual.
I've decided to drink no tea for a week; I'm just not feeling the qi like I should so it's time to give my body and head a chance to recalibrate. So I brewed up some jiaogulan yesterday and today with my new setup--infrared hotplate and ceramic kettle, and 80s 'thousand flower' cups. It is delicious. Years ago I drank it for its effect but didn't know how to make it taste good but now I can bring out the best in it. I can get three, even four infusions starting at about 70c and 30 seconds.