A site I found while looking up The Transbus Enviro 500 about 15 years ago now.
New World First Bus.... New ADL 'facelift' Enviro200 - November 2017
Also
GAKEI.com | EXHIBITION HONG KONG BUS 展覽香港巴士 (HKBEC)
Feel free to add photos if you find any other sites. Simon Ayers on youtube covers a lot of footage as well. Seeing as we have them in OMSI, the first site I posted, updates regularly and you can buy the models too, Joseph's site gakei.com is informative. Yet to visit HK myself though.
New World First Bus.... New ADL 'facelift' Enviro200 - November 2017
Also
GAKEI.com | EXHIBITION HONG KONG BUS 展覽香港巴士 (HKBEC)
Feel free to add photos if you find any other sites. Simon Ayers on youtube covers a lot of footage as well. Seeing as we have them in OMSI, the first site I posted, updates regularly and you can buy the models too, Joseph's site gakei.com is informative. Yet to visit HK myself though.