Will there be snowfall in Shanghai end of january? is it easy to travel during that time n shop open?

No, there won't be snowfall in the city at that time, according to the weather records of the past three years. Though, it will be cold for you, with the average temperature of around 8C. Just wear warm clothes! Generally, it will be easy to travel concerning weather.

As with the previous years, the shops will be open till the New Year Eve, Jan. 31, 2014. So you'd better go to visit before that date.

I WOULD LIKE TO SEE SNOW IN THE CITY. WHEN IS THE BEST TIME?

As I know, it may snow in early to mid Jan. and early Feb. but it will be just very light snow. If you really wanna enjoy snow, why not go to the northeastern cities of China like Harbin?