What are the risks of the Belt and Road Initiative?

The Belt and Road Initiative uses China's foreign exchange reserves as capital loans to developing countries and even underdeveloped countries, and promotes the export of domestic infrastructure equipment and related industries through the export of infrastructure construction, thus boosting GDP. However, can these developing or underdeveloped countries really repay their loans? Just like the Venezuelan loan of 50 billion yuan in China, it has not been repaid yet, and it does not want to increase oil production, so it can only be delayed in disguise. The biggest risk is that the debtor country cannot repay the loan.