The toilet is clogged, and it leaks from the back with a leather slinger

We can first try to use the original toilet flushing equipment to flush a few more times, if it still doesn't work, you can prepare a large basin of water, and then flush it down in one go, try several times repeatedly, if the blockage is not very serious, it will generally be solved. You can try to use a relatively long, not hard but not very soft, soft snorkel inserted into it, and flush with water while passing in, the water should not be too strong, so as not to splash outward, until it is flushed, and then flushed. >>>More

The easiest way is to buy a bag of "pipe passes" and pour them into the toilet, and then use a leather puff to dredge them after a while. >>>More

If the blockage is not very painful, it is better to buy that one, but to buy the high one, which is very stressful. Definitely useful.

Because the upstairs and downstairs sewers are connected.

If not, you can buy a bottle of oxalic acid, pour it into the toilet before going to bed at night, soak it overnight, and in general, the effect will be very obvious the next morning. If it doesn't work, then you can only let the professional dredging team deal with it.