If I were the spokesperson, I would have used "螳螂挡车"/"praying mantis blocking the wheel" instead. We know what happens after the wheel passed.To come into effect immediately I believe
I like that last bit in the MFA spokespersons statement:
I will stress again, Hong Kong is China's Hong Kong. Hong Kong matters are Chinese internal affairs. Any outside force attempting to interfere with Hong Kong's affairs are like ants, unaware of their size attempting to shake a tree.