152 days of Beijing Air

So over the weekend, I thought it’s time to change the air filters in my purifiers. Beijing, being the most polluted city I’ve ever seen, made me so conscious about my lungs that I bought 2 purifiers and 2 air washers for my 90 square meter apartment (each machine is capable of covering 50 square meters). Technically, according to the machine’s recommended date, I won’t need to change them til July, but I thought, Beijing being this dirty, I should just do it now. So ladies and gentlemen, these are my filters, old vs. new, 152 days apart. I really think Chinese government just don’t care at this point.