I want to make some handicrafts and sell them myself. Does it violate any laws and regulations of the country?

Selling money by one's own labor is nobody's business. Go out and set up a stall yourself, just be careful of the urban management. If you do more, go to a shopping mall or a market stall to sell it, even if it is wholesale to them. It's good. If there is a market, it is not bad to open your own shop in the future. If there is a storefront, you need to apply for an industrial and commercial license. If you finish it yourself, you don't need to go through the formalities to sell or set up a stall. It just depends on where you set up your stall and whether the urban management charges management fees. If you are in the market, the market may also charge management fees.