Questions about Xiaomi Smart Air Purifier 4 Pro Filter

Hello, Is this filter compatible with the Xiaomi Xiaomi Mi Air Purifier 4 Pro Ref : [https://www.galaxus.ch/en/s2/product/xiaomi-mi-air-purifier-4-pro-50-w-air-purifier-19112334?supplier=406802] Or is it this one ? https://www.galaxus.ch/en/s2/product/xiaomi-mi-air-purifier-hepa-filter-1-x-air-treatment-accessories-12597275 (or this one is for the lite and the 4 only) Thank you very much =D

Does this "Pro" filter fit into the "normal" Xiaomi Smart Air Purifier 4?

What is the best way to dispose of this filter?

Nowhere does it say, either in the instructions or on the website, how often the filter should be changed or at what intervals. Does anyone have any further information?

does anyone know if this filter is also compatible with the predecessor model "Xiaomi MI Air Purifier Pro H"? So in terms of size? Thank you

Why has the price gone up so much? I bought it for 50chf six months ago!

Is this filter compatible with this model? https://www.galaxus.ch/fr/s2/product/xiaomi-dispositif-de-ventilation-et-de-nettoyage-smart-pro-air-purificateurs-dair-21175288?supplier=406802