Shen can alternatively target an ally by clicking on their respective champion portrait on the left side of the screen or using the F1 to F5 keys.
Shen cannot target allies of whom he does not currently have sight of due to a vision-restricting effect, such as Nocturne'sParanoia or Graves'sSmokescreen. This includes prevention of casting it using the aforementioned methods of clicking the champion portraits and F1-5 keys.
Using Stand United on a stealthed ally will not remove their stealth.
Shen's teleport is not contingent on the state of his ally's shield. Breaking the shield will not cancel Shen's channel nor will breaking Shen's channel remove the shield prematurely.