Bit higher population density in North China earlier maybe, if the domestication timelines are similar? If the timelines are similar to what happened in North China with millets then that's later than earliest Pre-Pottery Neolithic in Fertile Crescent.
OTOH, pottery (earliest in East Asia) and agriculture would be together from the start.
Depends a bit more on what the Fertile Crescent gets back in exchange. If it's nothing, or much less efficient crops, then I'd guess most likely effect is everything is set back a lot.
(Like agriculture is not really happening as early or in as complete a form in North China, generally -
https://advances.sciencemag.org/content/5/9/eaax6225 - "Although broomcorn and foxtail millet are among the earliest staple crop domesticates, their spread and impacts on demography remain controversial, mainly because of the use of indirect evidence. Bayesian modeling applied to a dataset of new and published radiocarbon dates derived from domesticated millet grains suggests that after their initial cultivation in the crescent around the Bohai Sea ca. 5800 BCE, the crops spread discontinuously across eastern Asia. Our findings on the spread of millet that intensified during the fourth millennium BCE coincide with published dates of the expansion of the Sino-Tibetan languages from the Yellow River basin."
https://www.nature.com/articles/s41598-020-77404-4 - "Here we reconstruct the phylogeny of the Sino-Tibetan language family, using Bayesian computational methods applied to a larger and linguistically more diverse sample. Our results confirm previous work in finding that the ancestral Sino-Tibetans first split into Sinitic and Tibeto-Burman clades, and support the existence of key internal relationships. But we find that the initial divergence of this group occurred earlier than previously suggested, at approximately 8000 years before the present, coinciding with the onset of millet-based agriculture and significant environmental changes in the Yellow River region."
Whereas the earliest agriculture in Fertile Crescent is conventionally around 9000-7000 BCE / 11-9kya.)
