China tried this strategy in Africa, trying to garner international relationships and force countries to form dependence on them giving them leverage. Many Chinese companies were doing business in Africa in the 90's and early 2000's but the partnerships never really came to fruition. Yuan is even worse than USD so any country emptying their reserves for Yuan will eventually find the same problems they had with USD.
There is a fairly noticeable difference between the dollar and the yuan.
Yuan is a candy wrapper of China. Behind which there is only a huge population, Western technologies bought for dollars, and an export-dependent economy. And post zero liquidity of the Yuan.
The dollar is devoid of these shortcomings. He has one drawback - he is ENVYED, and realizing that it will not be possible to achieve the same level, or rather, a position in the world economy, they follow the path - "we cannot and do not know how to do as well as the United States, then at least we will try to cover up with shit the one who better than us."
Well, plus the classic desire of the world's rogue countries, at least somehow "to take revenge on the United States", for the fact that they are rogues and their prospects are sad