What's the point of protesting? Waste time cutting cardboards for placards, waste time braving the weather and get the flu in the process, waste time yelling and shouting- and get a sore throat in the process.
That's not a pragmatic solution to solving the problem.
Imo, wait for awhile for the outcome, before retaliating. There are more tech companies in China than there are in the USA or any of the Ango-Saxon countries at any given time.
Hence, this means there would be more high profile big shot executives in China at any given time. Apple, Cisco, Micron, Qualcomm, Boeing, etc. You name it. Its countless. Cook up some ficticious charges n arrest x 10 of the largest executives in China.