## 3 Hypothesis Development and Research Model
This variation necessitates further exploration based on the subjects of this study, and thus the following hypotheses are proposed. **H3. **: _Trust transfer value positively influences university students' continue using intention of LLMs in the context of online consumption of sustainable products._  
Green perceived value (GPV) emanates from the perceived value theories of [PERSON] and [PERSON] [49] and [PERSON] and [PERSON] [50]. Subsequently, [PERSON] and [PERSON] [51] defined it as the overall assessment of a product's or service's net benefits by users based on sustainable expectations and green demands. In traditional sustainable consumption, GPV is established through external certifications, such as green certifications and awards [52]. With LLM technology, university students can more accurately perceive the performance advantages of green products and reduce the time and money costs of information searching. Consequently, their perceived value of green products increases [53]. It is worth noting that LLMs internalize the functions of traditional green certifications during conversational interactions and realize the immediate perceived value of green products. Moreover, when this value perception corresponds with the sustainable values of university student users and continuously enhances green benefits in their online consumption, it may engender a greater intention to continue using LLMs for the interaction itself [46]. Based on the aforementioned theory, the following hypothesis is put forward. **H4. **: _Green perceived value positively influences university students' continue using intention of LLMs in the context of online consumption of sustainable products._  
Green self-identity value (GSV) is defined as the sense of identity university students acquire through the use of language models (LMs) to facilitate the purchase of green products online [54]. Self-identity is a significant aspect of an individual's self that is associated with specific behaviors [55]. This aspect is particularly important for green consumers, as they often prioritize environmental sustainability and social responsibility [46]. Previous research has shown that green product descriptions generated by LLMs have the capacity to evoke self-identity among university student users [56]. Moreover, psychologists and sociologists posit that there is a close relationship between self-identity and behavioral intentions [55; 57]. In summary, GSV emerges as a critical psychological mechanism in this context. Specifically, users may show eagerness to use LLMs because they can acquire GSV via LLMs [58]. Hence, the following hypothesis is put forward. **H5. **: _Green self-identity value positively influences university students' continue using intention of LLMs in the context of online consumption of sustainable products._  
In the context of sustainable product online consumption assisted by LLMs, perceived ease of use (PEU) specifically refers to the cognitive effort required to use the system. When users perceive LLMs as easy to operate, their technological acceptance significantly increases [59]. For instance, [PERSON] et al. [60] also confirmed that users' perceptions of LLMs usability are significantly positively correlated with their intention to use them, primarily due to intuitive design and simplified operational processes that reduce users' usage costs. Within the PEU framework, perceived value assumes an additional promotional function in promoting continued use. Therefore, the corresponding hypotheses are put forward. **H6. **: _Performance expectancy value indirectly but positively influences university students' continue using intention of LLMs through perceived ease of use in the context of online consumption of sustainable products._  
**H7. **: _Information quality value indirectly but positively influences university students' continue using intention of LLMs through perceived ease of use in the context of online consumption of sustainable products._  
**H8.