Can a person who travels and stays somewhere for one day join and shorten his prayers?

Do the rulings on travellers apply to one who intends to stay for three days?

Should he shave off his beard if he travels to a country where those who have beards are persecuted?

The traveller may shorten his prayers even if he is not encountering any difficulty

Should a traveler pray four rak’ahs with the congregation or pray two rak’ahs on his own?

Travelling to seek knowledge without parents’ permission

Raising one’s hands for du`a when travelling

Not doing regular Sunnah prayers whilst travelling apart from the Sunnah of Fajr

The traveler may pray the travel (shortened) prayer once he has passed the city limits

Traveller should make his prayers complete if he intends to stay more than 4 days