It would be pretty hard (from the technical and legal perspective of a drinks-the-koolaid network engineer at the Chinese version of the FCC) to build a fully compliant, tamperproof version of the GFW into a standalone CPE rooftop antenna+indoor router combo. The Chinese GFW architecture relies on the government having pretty strict control over the major ISPs (top 20 to 30 AS numbers in the country by size of APNIC v4 and v6 blocks, number of peers, etc) that have capacity in the submarine cables linking china to other southeast asian nations, and directly to the USA. Also on the terrestrial cross border fiber.