There are three simple summaries.
money
bond
stock
Mixing is a combination of bonds and stocks.
100-200, not much. I suggest you buy money funds and bond funds (those without subscription and redemption fees). Bear markets can buy a lot of closed-end funds through the secondary market, that is, stock trading. Once your shareholding expires, there will be a premium space to close your position. The income is not much, but it is also quite a lot. I'm talking about the safe way, before you have much money. Because 100-200, making a fixed investment is not enough for banks and brokers to charge you a handling fee.
In addition, it is cheaper for brokers to buy funds than banks, but the threshold is high. Most of the funds need more than 1000.
China Merchants Online Banking can be set up, and it is more convenient to buy some money funds and bond funds, and there is no handling fee.