What does it mean that people next door deliberately knock on the wall to disturb the people?

If they knock on the door on purpose, you should ask if there is any other meaning, or you can choose to call the police directly.

Content expansion:

Legal analysis: Strictly speaking, knocking at the door is particularly loud, which is not a nuisance, because knocking at the door is a short process after all, and the duration is insufficient. After 22 o'clock in the evening and before 6 o'clock in the morning, it is regarded as a nuisance and you can call the police.

Legal basis: Regulations of People's Republic of China (PRC) on the Prevention and Control of Environmental Noise Pollution.

Twenty-first construction units to discharge noise into the surrounding living environment, shall comply with the national standards for environmental noise emission at construction sites.

Twenty-third construction noise emission exceeds the national standard for environmental noise emission of construction sites, endangering the surrounding living environment, the environmental protection department of the local people's government may limit its operation time after reporting to the people's government at or above the county level for approval.

Article 24 It is forbidden to carry out construction operations that produce noise pollution and affect residents' rest in residential areas, cultural and educational areas and convalescent areas at night, except for emergency repair and emergency rescue operations. If continuous operation is necessary due to production technology or special needs, it must be approved by the environmental protection department of the people's government at or above the county level.