In all languages, context is important and this leads in varying degrees to the use of abbreviated sentences especially in speech. Chinese has its own conventions in this respect and in particular tends to omit conjunctions and pronouns, especially the third person neuter. Take the following examples:
Wǒ mǎi le yī gè jú zǐ，tài suān，méi chī。
I bought a tangerine, (but it) was too sour, (and I) didn’t eat (it).
Nà jiā shāng diàn hái yǒu yǔ sǎn mài，zhè ér mài wán le。
There are umbrellas for sale in that shop, (but they) are sold out here.
Tā hěn xǐ huān hē pí jiǔ，wǒ bú xǐ huān，tā gèng bú xǐ huān。
He likes beer a lot, (but) I don’t (and) she likes (it) even less.
Tā yǒu sān gè hái zǐ，wǒ méi yǒu。
She has three children, (but) I don’t have (any).
Zhè xiē jú zǐ hěn hǎo chī，nǐ yào ma？
These tangerines are very nice. Do you want (one/some)?
 Yip, P. C., Rimmington, D., Xiaoming, Z., & Henson, R. (2009). Basic Chinese: a grammar and workbook. Taylor & Francis.