This study aims to describe the manifestation of language choice and the dominant factors of determining language choice among Chinese community inter-ethnic and intra-ethnic relations in Medan. This study used descriptive qualitative method emphasized on a multiethnic and multilingual Chinese community background. The sociolinguistic theory of language choice focused on the domain features involving family and occupation domains was used as the basis of this study. It applied Miles and Huberman technique for analyzing the data and the Bungin formula for calculating the data. Of the 80 respondents, the results of the questionnaire showed that the Hokkien sub-ethnic was the dominant sub-ethnic in Medan compared to other Chinese sub-ethnicities. The manifestation of language choice in the domain of family and occupation especially in inter-ethnic relation is dominated by vernacular language, especially Hokkien language although respondents come from non-Hokkien ethnic. However,  Indonesia language becomes the main language used related to intra-ethnic relation. In addition, the dominant language choice factor is influenced by Chinese participant’s cultural backgrounds similarity.

Mandarin has been used as one of the subjects in Indonesia's schools including kindergarten/PAUD. However, many obstacles faced by the school. The lack of training and teaching staff of Mandarin for early childhood education moved the hearts of the USU Community Service Team to conduct Early Childhood Mandarin Learning training for pre- school educators in one of the Kindergarten schools in Medan, namely RA Ar -Rahmah. The method of this activity is intensive training with a blend of theory and practice as well as discussion and performance of the training results. Teaching Mandarin to educators is carried out with the principle of "Teaching Mandarin to young children" while still considering and respecting the position of participants as instructors who have different backgrounds and experiences. The training follows the principles of TCFL (Teaching Chinese as A Foreign Language) in the form of applicative and simple material through flashcards, folding paper, singing simple songs, how to introduce yourself, etc. The results of the teaching practice carried out were very satisfying and as expected.

Community service activities for students at the Faculty of Language and Communication, Universitas Harapan (FBK UNHAR) Medan to implement haji bunka towards social distancing policies amid the Covid-19 pandemic are an appropriate activity in providing an understanding of Japanese shame culture (haji bunka) for FBK UNHAR students and its implementation to prevent the spread of Covid-19. FBK UNHAR is a private higher education institution in Medan that faces challenges in implementing education on campus during the pandemic and the government's new normal performance. In this service, the team has conducted a socialization about the implementation of the haji bunka on campus, such as replacing handshakes with ojigi, wearing masks, classifying garbage, and other activities that can help prevent the spread of the coronavirus. Offline socialization activities were carried out through lecture methods and discussions with students. Following the socialization, the community service team and students agreed to incorporate the haji bunka into daily student activities on campus, as well as the protocol for implementing lectures if it is applied offline.

Pemilihan ini bertujuan untuk mendeskripsikan wujud pemilihan bahasa dan faktor dominan pemilihan bahasa pada remaja etnis Tionghoa di Medan dalam hubungan interetnik. Penelitian ini dilatarbelakangi oleh masyarakat Tionghoa yang multietnis dan multibahasa. Teori sosiolinguistik dan konsep ranah digunakan sebagai landasan penelitian ini. Ranah penelitan difokuskan pada ranah pendidikan. Metode penelitian menggunakan metode penelitan deskriptif kualitatif. Metode pengumpulan data menggunakan metode Sudaryanto. Dan perhitungan data menggunakan rumus Bungin. Responden penelitian berjumlah 70 responden. Hasil penelitian menunjukan wujud pemilihan bahasa ranah pendidikan pada remaja Tionghoa di Medan didominasi oleh bahasa Hokkian dan faktor pemilihan bahasa dominan adalah kesamaan latar belakang budaya partisipan.   This research aims to describe the form of language choice and the dominant factor in language choice among Chinese youth in Medan in interethnic relations. This research is motivated by a multiethnic and multilingual Chinese community. Sociolinguistic theory and the concept of the domain were used as the foundation of this research. The research domain is focused on education domain. The research method used descriptive qualitative research methods. The data collection method used the Sudaryanto method. And data calculation using the Bungin formula. Research respondents numbered 70 respondents. The results showed the form of language choice in Chinese teenagers in Medan was dominated by Hokkien language and the dominant language choice factor was the cultural background similaritiy of the participants.

In this study focused on to describing the types and functions of the Tionghoa community utterances that tend to use Hokkien language and the non Tionghoa community that typically to use Indonesian language. The theory proposed by Austin and Leech was used to classify and analyze the speech act data delivered and collected through a non-participative observation and taking notes technique. The data were obtained from five traditional markets in Medan from July to September 2020. The data showed five kinds of speech acts from both the Tionghoa and non-Tionghoa communities. A directive speech act was the dominant speech act obtained because the directive speech act influenced the interlocutor. In this case, the customer dominated the seller to do what the customer demanded. The directive speech act also showed the chief ordering function found in the Tionghoa community, and the bargaining function was located in the nonTionghoa community. The ordering directive speech act prevalent in Tionghoa speakers related to the character of the majority of Tionghoa community members in Medan, which was straightforward. In this case, they gave orders or directly asked for what they needed or sought. Meanwhile, in the non-Tionghoa community, the utterances refer to buying and selling laws, dominated by bargaining utterances, both bargaining for goods or prices. In comparison, the declarative speech act is the minor speech act found to express resignation towards the COVID-19 condition.