The distance between Lucknow and Kanpur is less than 77.25 kms and Lucknow is your native place; hence you shall offer complete salah in Lucknow and Kanpur in the question mentioned above and you cannot do qasr. Yes, if you go Kanpur by such a rout in which the distance between Kanpur and Lucknow is at least 77.25 kms then in such case you shall be musafir in Kanpur and do qasr, provided you do not intend to stay there fifteen days or more. So it is mentioned in the book of Fatawa.
Allah (Subhana Wa Ta’ala) knows Best
Darul Uloom Deoband