There is no such thing as a non-biased perspective, and feminism makes no claim to avoid bias; it's literally an ideology, with gender equality as one of its goals. The purpose of the signal-boosting strategy is to avoid patronizing echoes of "I know better" colonialism, not avoid bias. In this case we can listen to the many, many women in China who speak of the problems they face. In no sense are their voices co-opted.