Looking for advice to find a warehouse in China to store parts of my products before sending to manufacturer of the final product.

Hi there, as the title implies, I am looking for a company / warehouse that proposes storing services in China.Long story short, I have a product that comes in 3 material variants. I wanted to launch all 3 at the same time, but in the end there is still some testing or tweaking to be done for 2 of them and I need more time to be sure that the manufacturer and I are on the same page, so I intend so start with only 1, which is on point.The thing is, I had custom parts made from 2 other companies that specialize, each in their respective field, in manufacturing the materials that I needed for the said parts and I can't really lower the order quantity.Since I still plan on having the 3 material variants made at some point for my product, I want to order the parts that I need from these 2 companies and store the extra somewhere before sending them to my product manufacturer when they will eventually be needed.I don't need huge spaces or weight allowed, we are talking 25 kilos for 20000 pieces here, and even less for the second component, and nothing is particularly fragile. Any idea ?I used to do this kind of stuff with AOI express for small quantities, but they have a 30 days storing limit. see hubwealthy.com/wealthy