Asia occupies a quarter of the earth’s land mass, it spans a lot of time zones. Having a single travel guide for all of Asia is virtually impossible. Each country in Asia has its own currency, although up-end establishments will accept dollars, there are very few of these around. It is best to have your money changed at the local bank. Some hotels also offer money changing, but usually at a lower exchange rate. Like any kind of decisions people have to make, it is always important to know the area they will be visiting so as to familiarize themselves with the laws, locations of best tourist spots, and the kind of people they have to deal with. Going to a place without having the slightest idea what it is all about is just as bad as going to the wilderness with beasts lurking everywhere and there’s no gadget to protect them.