Why China, which has an over-population problem. Why not countries who want to solve their declining population problems such as Russia, Japan, many Western European countries, or Israel (whose Jewish population is declining quickly relative to other groups)? Those with popular biases in favor of specific ethnic groups might see this as the alternative to immigration or national decline.
The problem for Japan and most Western nations is not that their young people are infertile, it's that their young people are unwilling to marry and have children. (And even those who are willing, are only willing to have one or two children, and only at age 35+.) Cloning can't solve that problem!
