The websites you've used don't prove anything. You used random internet blogs who cite no sources to their claims. You simply searched for "Xi Jinping net worth" and that was your "research". The sources say that Xi Jinping's annual salary is of $22 million. This 2015 China Daily article mentions the Ministry of Human Resources and Social Security and Xi Jinping's actual salary:
According to the plan, all civil servants will get a raise. The basic monthly salary for national-level officials, who are the seven members of the Standing Committee of the Political Bureau of the CPC Central Committee, including President Xi Jinping, will increase from the current 7,020 yuan ($1,130) to 11,385 yuan, a raise of about 60 percent.
This makes Xi Jinping yearly salary about 136,620 yuan a year, or about $19,700 dollars a year. Here is an official source for the salary of Xi Jinping. The only sources that claim Xi Jinping has a net worth of about $1.5 billion like you claim, are random blogs like you cited and anti-communist pieces. The net worth claims range from $1.5 million to $10 billion and some of them are very honest that they are taking this estimate out of their asses, such as this one:
According to reports, Xi Jinping's net worth in 2022 is around $1.2 billion. Though most of his finances are not declared in public, there is no means to validate the exact figure.
One of your links claims cites a distorted interpretation of a Bloomberg article, which claims the following:
No assets were traced to Xi, who turns 59 this month; his wife Peng Liyuan, 49, a famous People’s Liberation Army singer; or their daughter, the documents show. There is no indication Xi intervened to advance his relatives’ business transactions, or of any wrongdoing by Xi or his extended family.
The article also claims wealth can only be traced to Xi Jinping's extended family, where they have investments in several businesses, but nothing linking to Xi Jinping himself.