I want to provide a partial answer, with a "kind of, but not directly" to summarize. This is more to provide the resources and evidence I've found so hopefully this can be answered definitively by another user. (or maybe myself at a later date)
First and foremost, China is the beneficiary of preferential trade agreements, while not a direct form of aid, this alone can relate to billions of dollars a year less paid to import their products to the countries who provide said preferential trade agreement.
It's also important to explore the counterpoint noted by Fizz in the comments on the question, since 2010 China has introduced their own preferential trade agreements (available at same link as above, under "provider of"). This lists 44 LDCs or, least developed countries, for which China waives or drastically reduces import fees from these nations, also providing "billions in aid" "through the WTO". For lack of better phrasing.
Now on to actual aid. That's hard. The WTO technically does not distribute aid themselves:
Most Aid-for-Trade is disbursed bilaterally by donors or through multilateral and regional finance and development organisations, such as the World Bank and the regional development banks.
It includes technical assistance — helping countries to develop trade
strategies, negotiate more effectively, and implement outcomes.
Infrastructure — building the roads, ports, and telecommunications
that link domestic and global markets. Productive capacity — investing
in industries and sectors so countries can diversify exports and build
on comparative advantages. And adjustment assistance — helping with
the costs associated with tariff reductions, preference erosion, or
declining terms of trade.
It's important to note that:
[T]he WTO can not deliver development assistance. It is not a
development agency, and has no intention of becoming one. [Their] core
mandate is — and must remain — setting trade rules.
Back to "[m]ost Aid-for-Trade is disbursed bilaterally by donors or through multilateral and regional finance and development organisations."; the most recently completed (2021) Aid-for-Trade Stocktaking Event's report show's
The IMF's role in economic recovery is central in advising countries
to move swiftly to policies that support workers and businesses. The
fund has lent 107 billion USD to low-income and commodity-dependent
Being a commodity-dependent economy implies some portion of those IMF funds were provided to China, and in some ways facilitated by the WTO - it is not aid directly from the WTO.
For more information this year's, ongoing at time of writing, Aid-for-Trade Stocktaking Event.