Why can't Handan Social Security log in

Software upgrade. As the Handan social security self-certification app is too old for software upgrades and maintenance, there is no way to log in to Handan social security in this case. Handan is located in the southern tip of Hebei Province, west of the Taihang Mountains, east of the North China Plain, bordering Jin, Lu and Henan provinces, is the Beijing-Tianjin-Hebei Cooperative Development and the Central Plains Economic Zone regional center city. Handan is an important node of the east out of the west, through the south to the north.