Ant-Man was HUGELY successful in China this past weekend, making $43.5 million on opening weekend (which is frankly more money than I can even imagine). The film made $57 million in its domestic opening weekend, so not only is the Chinese market pretty comparable, it currently represents a huge portion of their earnings. It would make sense for Marvel to try to appeal more to this market. The question is: can they?
How many Chinese Marvel characters can you name?
There aren't many. And maybe that's a good thing, Marvel's track record for racial representation is not the best. Part of it is a symptom of the source material; anything made in the 40s and 50s is sure to have some vestigial biases of the period. But that's not an excuse for their current failures. For every Kamala Khan and G. Willow Wilson, there are literally hundreds of white male protagonists and white male writers. This is true in the comics and overwhelmingly true in the films.
Consider the decision to include The Mandarin in Iron Man 3 before any Asian heroes (the closest they came was the Japanese character Jim Morita in The First Avenger). The character was a racist Chinese stereotype, and the film turned him into a racist vaguely Middle Eastern stereotype. And sure, the Chinese government helped to finance the film (via the DMG film group), but how well did it serve the Asian community when it comes to representation?