In recent days, there has been a dramatic increase in the number of transactions in the a unit. The economic cycle at the beginning of 2019 was once again a hot topic for the media, owing to the fact that the chief economist of a securities firm had been more successful in predicting the 2007-2008 subprime mortgage crisis using the convulsive cycle theory, and had again predicted 2019 as a turning point for the chinese economy, a rare investment