Thanks Pal and I understand your thinking .
I just finished 12 years & 46 days 'living in Shanghai , China - along with over 100,000 km of bicycling + many many 'miles of motor biking riding ....
From this experience I can say :
* The China UNESCO sites , as all UNESCO sites have high & low seasons . Plus 'with some home work you can miss the crowds or go to another part of the site via travel blog / chat sites .
* Motor bikes in China - we export motor bikes , along with the extensive testing . After many many miles of riding 'we have found road conditions , air pollution & weather to challenging ..& after awhile 'why take the 'mainland risks all year long ?
* I am an American { enjoying lunch in Pudong - Shanghai ....'TGIF !...and have been to 49 states ..How many have you been to ?
Last ..have been to Hawaii + 'we have a few associates there .....and the air has been foul with volcano gases..etc

Never had that situation on Hainan {over the past decade} . The pictures above have no photo shop and would be happy to escort U to each place .

...Cheers Pal ....