Well , what a nice day !   Yeah , the air is really fresh .   But it was not at all so fine yesterday .   Because it rained last night .   Did it ?   It sure did . It was a heavy storm , with lots of thunder .   I was fast asleep , and didn't hear a thing .   Well , it may rain again later today .   Maybe . I see some dark clouds moving in .   There may also be a strong wind coming in .   It'll be dusty , too , I guess .   Maybe not . Dust is no longer a big problem in Beijing .   Why is that ?   We've been planting trees for many years .   I see . The fall in Beijing is really beautiful . 