For example【Bǐrú】：Chinese pronunciation and writing

About the Chinese learning module here, it can help you to memorise the word, besides, the teaching material of this module is designed to strengthen the learners' application of the word, you can practice pinyin and writing the word repeatedly in about 30 minutes so that you can memorise the word with your daily conversations; among them, when you type on a mobile phone or a computer, you express yourself in Chinese without any mistake, but it seems that the other party doesn't understand you very well because the tones are not marked. The reason why you don't quite understand is because you don't put in the tones. Remember, the tones determine the meaning of the expression, and the attitude is also affected by the tones, i.e. the ‘tone’, different tones and different attitudes, which is important. Cheers for your efforts, and good luck with your studies!
The Chinese pronunciation has 4 tones ¯ˊˇˋ, which are labelled above [i, u, o, a, o, e], for example, ā á ă à, ¯ 1, ˊ2, ˇ3, ˋ4, and in addition to the ¯ˊˇˋ symbols, 1234 can also be used to indicate the rhyme.
In addition to the ¯ ˊ ˇ ˋ symbols, it is also possible to use 1234 to indicate a rhyme, and to use a number at the end of a spelling.
In books with pinyin, the rhymes ¯ˊˇ¯ are usually used; for messages using spelling, numbers are sufficient.
Each word is spelled with only one rhyme. If there are two or more words in the same meaning, the spelling is still based on one word, one rhyme, and one set of spelling.
Examples: (Learning)
Learning　学习，【xué xí】xuéxí ，【xue2 xi2】 xue2xi2
Practice　练习， 【liàn xí】liànxí，【lian4 xi2】 lian4xi2
with spaces between the pinyin of the words and without spaces between them，Both representations are fine．