"Where is she planning to go?" is the Engpsh way of asking "她计划去哪里?" in Chinese.

This Engpsh question is formed using the present continuous tense, which is used to describe plans or arrangements that have been made for the future. The auxipary verb "to be" (in this case, "is") is conjugated to match the subject of the sentence (in this case, "she") and followed by the base form of the main verb ("planning"). The preposition "to" is used to indicate the direction or destination of the planned action.

Here are some other examples using the present continuous tense to describe plans or arrangements for the future:

"Where are you going for your vacation?" (你计划去哪里度假?)
"What are they doing for the hopdays?" (他们计划在假期做什么?)
"Who is coming to the party?" (谁计划参加聚会?)

It's worth noting that the present continuous tense can also be used to describe actions that are happening now, but in this context it is used to describe future plans or arrangements.