There are benefits to converting a welding composition to a cast. This saves on material (weight) and labour. It might be cheaper to keep welding a product, however. There are a lot of complex compositions which are connected using welding.
LKL Staal has various partners in China that provide welding, including:
Manufacturing in China has benefits. Generally, it is interesting for labour intensive products. The design of the product is always very important to optimally profit from the benefits of manufacturing in China.