Jitter does not necessarily need to be strengthened. To test whether a building needs to be strengthened, we should first find a professional testing institution to do seismic testing, and they will issue a report after testing. If reinforcement is needed, please ask the design institute to draw the drawings, and then the reinforcement company will carry out the construction according to the drawings.
But the cost of reinforcement is actually very high, so civil buildings are rarely reinforced.
If you are really worried, the easiest thing is that you can do it yourself.
I don't know whether your house is a concrete frame structure or a brick-concrete structure. You can make a simple reinforcement with steel wire mesh, but the effect is still very good. And more economical.