2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/41664Again, this preprint has been combined with hep-ph/0207106, which is co-authored by both of us. Therefore, this preprint has been withdrawn. Readers are welcome to refer to hep-ph/0207106.This preprint has been combined with hep-ph/0207106, which is co-authored by both of us. Therefore, this preprint has been withdrawn. Readers are welcome to refer to hep-ph/0207106High Energy Physics - PhenomenologyRevisiting pion electromagnetic form factor in perturbative QCD approach and its reliabilitytext