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Putonghua and the dongbei dialect
There are some differences between putonghua and some dialects, which are spoken in different parts of China, including the dongbei dialect.
Written Chinese and grammar are almost the same, but there are some words in the dongbei dialect that are not used by people who speak putonghua. For example, dongbei people often use gala to mean jiaoluo in putonghua, and use anmen to mean women.
It is easy to tell small differences in pronunciation and intonation between putonghua and the dongbei dialect. For example, ren is often pronounced as yin. However, the differences are so small that people who speak putonghua and those who speak the dongbei dialect can understand each other without difficulty.