Industrial era 4.0 shows that all human activities will be connected and dominated by digital media. Creativity and new ideas to innovate technology are the keys of this era. For example in the music industry 4.0, which develops music streaming technology products, trying to attract a lot of millennials generation. In the context of Indonesia, Langit Musik as a local product competes with Spotify as an international product. Therefore, through this literature review-based research and interview with some of the participants in Whatsapp phone call, researchers want to see what kind of music streaming platform in the industrial era 4.0 make many peoples interested, especially the millennials generation in Indonesia. The results show that the use of Spotify in Indonesia is still more popular than Langit Musik, because for most of the Indonesian millennial generation Spotify is already suitable for the music streaming criteria they want. These include a diverse and global selection of songs, from old songs to the latest songs that are always up-to-date, have a simple and eye-catching display, easy to use, clear sound quality, have lyrics for karaoke, integrated with social media for status updates, have playlist personalisation feature, and no need to use large mobile data internet quota. However, Spotify and Langit Musik are still not able to attract their customers to switch from free to premium services, due to different needs and there are people who are still comfortable downloading songs illegally even though they already had music streaming. Spotify has become more popular than Langit Musik because of consumer trust in its quality, besides that personal promotion by word-of-mouth from the closest people and status updates on social media, which also support the expansion of Spotify's popularity.

The presence of Spotify as an online music streaming platform is a new alternative for music lovers to enjoy music without having to buy physical albums or download songs illegally and stored it on smartphones, which take a lot of memory. Spotify is getting more and more popular as we can see from the increasing number of Spotify users every year. Therefore, this study wants to know in depth how the millennial generation's experience in using Spotify can influence their decision in recommending online music streaming to non-Spotify users with the WOM technique. This is because Spotify is one of the most popular online music streaming platforms. This research using phenomenology method that is equipped with in-depth interviews. The results of the study show that millennial Spotify users are satisfied with the quality and the many benefits they get, especially if they choose the premium service. So they want to recommend this application to music lovers, especially music streaming lovers. Spotify is also very suitable for music lovers who are active, productive, and often listen to the songs.

China is the largest superpower country in Asia nowadays. With its popularity in the fields of technology, transportation, infrastructure and others has attracted ASEAN countries, including Indonesia, to become more interested in tightening cooperation with China. However, what is almost forgotten is how China takes advantage of this moment to expand its expansion to other countries and it starts from the nearest countries. In this study, the authors used qualitative research methods -descriptive analytic with Library Research data collection techniques. The purpose of this study is to see how hegemony in bilateral relations between Indonesia and China. The results are hegemonic practices exist in bilateral relations between Indonesia and China through the OBOR project and Mandarin Language Center institutions such as Confucius Institute