Transactions that occurred before the abolition of the law can still be applied after the abolition of the law. Because the new law is generally not retroactive, that is to say, the old law is also applicable to acts that occurred before the new law came into effect, but there are exceptions to some crimes in the criminal law. If the new law is lighter than the old law, then the new law should be applied, which is the principle of both old and light in criminal law.

Transaction refers to the exchange of value between the two parties through money and services. In reality, transactions can be barter (such as equivalent exchange of goods) or money for money (currency exchange); Most transactions in the internet financial world refer to the exchange of price and value based on stocks, funds, foreign exchange, spot, futures and options, and earn the intermediate price difference according to the price fluctuation of different target varieties, which is also commonly known as transactions.

Transaction generally refers to the exchange of goods or currencies between the two parties in exchange for their own needs, and generally signs a sales contract. Trading is the earliest and most basic trading behavior of human beings. Now it is commodity exchange, that is, the process in which buyers and sellers transfer property ownership and pay the price. Generally speaking, there must be a certain price difference between buying and selling, which is called buying and selling.

Consistency in trading means that you follow the same rules/principles for a long time (at least a few years). Many people learn to chase the daily limit when they see that others make a lot of money chasing the daily limit. After a while, it was good to see someone doing oversold rebound, so I gave up the daily limit technology and changed to oversold rebound. Rules often change, so it is not a concerted action transaction.

Article 596 of the Civil Code of People's Republic of China (PRC) generally includes terms such as the name, quantity, quality, price, time limit for performance, place and method of performance, packaging method, inspection standards and methods, settlement method, words used in the contract and their effectiveness.

Article 597 Where the ownership of the subject matter cannot be transferred due to the seller's failure to obtain the right of disposition, the buyer may terminate the contract and require the seller to bear the liability for breach of contract.

Where laws and administrative regulations prohibit or restrict the transfer of the subject matter, such provisions shall prevail.