I understand now, many of the Chinese population do not want to live in the San Fernando Valley is because of a bad school district, poor city government, and bad infrastructure. Asians want good schools, infrastructure, and city government since they rely on education.The typical pattern is that early Chinese immigrants (which were relatively few in LA) settled in urban "Chinatowns" but later immigrants moved to the more well-to-do suburbs (same sort of pattern in the Bay Area and NY).
The SGV has the advantage of being mostly separate cities, which are better maintained due to being outside the LA city limits. School districts in particular, which are really quite bad in LA, encourage parents with an interest in their children's education to move into other areas, and most Asians are strongly focused on education. The SFV unfortunately is almost entirely LAUSD.
See also the OC, where the densest Chinese population is in places like Irvine, which have excellent schools and very well run city services.