A shares are RMB stocks, and B shares are special RMB stocks. Generally speaking, B shares are traded in US dollars and Hong Kong dollars. /kloc-You can open an account over 0/6 years old. Just buy a shares, in RMB. If you buy 100 shares, according to the number you buy, there is a minimum commission from 5 yuan. For example, if you buy 10 yuan shares, you buy 100 shares, which is 1000 yuan. According to the commission calculation of online transactions, you have to pay the commission of 1.8 yuan (stamp duty and transfer fees are not included here for the time being), but you have to pay the minimum commission of 5 yuan. Please pay attention to this. Other H shares, L shares and so on, you don't have to consider, are all foreign shares. Blue-chip stocks, in layman's terms, are listed companies with good performance and more dividends. Financial blue chip is a listed company with good performance in its financial industry, securities of the three major financial institutions, insurance and banking. If their performance is good and not bad, they should be considered blue chips.