Why do we need postcards nowadays? Electronic communication is better and cheaper than it's ever been. However,postcards always take more than 2 months from Russia to China(both of them are almost the slowest country) and cost more money than the net. So why do we need postcards nowadays? Above all,postcards are very beautiful and have strong local colour. Cologne Cathedral,different local stadiums... It's a novel sightseeing journey on the paper. In addition,postmarks and stamps are also very important. I detest dimensional barcode stamps...without aesthetic feeling. At last,postcards are cheaper than letters.I like to send postcards to myself when travelling.It's a special part of memory. If you want to give someone a surprise,go to send postcards to him/her~ WARNING:Don't write your private information on the postcards. And remember to use electronic tools when you need to deliver an urgent message!

Traditional Chinese Instrument 雅俗于心，发于外者，表象而已。 琴乐己，筝娱人。 Many Chinese learners can't tell the difference between 2 traditional chinese instruments,Guzheng(古筝) and Guqin(古琴). Personal preference may influence the choice. In my mind,Guqin is the best chinese instrument. The unique characteristics of Guqin are its inconceivable performance of peace. e.g. http://www.youtube.com/watch?v=V2vehq2mHNM Guqin culture always accompany with the long history of China.And it lives in the ancient times forever. Though more popular than it used to be, this instrument is still " too highbrow" to the general. Too hard to delight others through it. Guqin expresses vicissitudes. As for Guzheng...well it's very sonorous... e.g. http://www.youtube.com/watch?v=eyNmZqmInkM More likeable and easier to learn. Rolling in the deep(Guzheng):http://www.youtube.com/watch?v=R0shsRmSxLI

nuclear security

Is it necessary to use nuclear energy nowadays??