Hi there @ZhangSolShuo, welcome aboard to our Community. I'm not sure if you are asking for the complete list of manual activities available on your Fitbit Account. If this is not the case, feel free to correct me.
Now if you need a public list of activities, note at the moment there is not option to see all the exercises available on your Fitbit account. However you can take a look at @Colinm39's post who took the time to list all the different exercises you can find as manual activities. Despite this is a workaround I would dare to say is a nice list and very complete.
Hope this information helps and let me know if you have more questions.
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