How much of that investment is actually planned for use in China versus how much is investment for manufacturing product that will be sold elsewhere?
you haven't actually answered the question (in bold above).
People who are interested in their first washing machine are not necessarily interested in green technology.
Nowadays, most of the Chinese investments in green technologies is for domestic use. It's not out of the goodness of their hearts; it's simply because there is a constant shortage of resources.
That's where the fantastic expertise they have in recycling and refurbishing comes from. Did you know that in most cities, the majority of household garbage is *sold*, not thrown away? It's so common that keeping the trash is often seen as a bonus given to housekeepers by their employers.
Recycling and being green is not a virtue in China, it's common sense. The reason why pollution is still bad is because in many industrial sectors or regions the technology to do things in a more sustainable way isn't available or affordable yet. But it's changing fast, and when a situation is very bad like it happened in a few regions, the local government usually steps in and shutdowns the worst offenders.
Whether it's green technology, software, clothes, food, or anything else, China is now the biggest market for Chinese companies. This is completely different from 10 years ago.