Shot here from Cheung Chau today – looks like there are few clouds above us (certainly nothing evident on satellite images), and yet the sky isn’t blue, but greyish-white, with the only blue just visible right overhead. HK Observatory mentions "some haze" yet, curiously, their haze icon not showing today, or in 7-day forecast: just a sun icon for today. 
Wild About Hong Kong - hiking, wildlife, conservation and more
Wild About Hong Kong - hiking, wildlife, conservation and more