What you need is to provide details like input voltage, output voltage, frequency and little things like that. Saying you want an inverter circuit diagram tell people here nothing. Details, Details, and Details!
China just laid their (mixed communist and capitalistic) hands on Taiwan! Nevertheless Taiwanese manufacturers are independent in their production policies.
I'm in close contact with Taiwanese manufacturers and they don't solely want to go for cheap mass production as it's practiced in China.
Overall Taiwanese products have a good international reputation.
They also usually don't use semiconductors manufactured (copied) in China but prefer well known quality products from TI, NXP, ST and so on.
Yeah. Sure it's possible to make this out of an car DC start motor and physically connect this to a motor to an washing machine
Theoretically it could work. This guy made it. But you'll probably need a bigger cap, bigger ac motor AND a powerful motor that can deliver more than 1kW.