Some people do use assets to sponsor an immigrant (my husband used his assets to sponsor me).
If your wife wants to use YOUR INCOME or ASSETS in YOUR NAME- she needs your consent.
You would have to complete an I-864 A and then give her proof of assets/ income.
If you do not complete the forms or provide the documents your wife cannot use anything in your name.
If your wife's parents are currently in China, you don't have to worry about the financial support issue for about 1 year. If she wants to file for them, she can and if she wants to sponsor them she should consider getting a job so she has sufficient income in 12 months when she is asked to submit the I-864.