Having mentioned the whole picture of silicon photonics market and technology, let's discuss about Co-packaged Optics (CPO). Due to the rapid development of new technologies such as big data, cloud computing, 5G, AI, etc. in recent years, the data transmission volume has shown significant growth, according to the report of IDC, a market research organization, the global data traffic in 2020 will be 51 ZB, and it is estimated that the global data traffic in 2025 will grow to 175 ZB, with a compounded growth rate from 2020 to 2025 of 28%. In the past, the use of telecommunication signals for the transmission of data was used, but since photonics is faster than electricity and does not transmit data, it is not necessary to use photons. In the past, telecommunication signals were used to transmit data, but since photons are faster than electrons and do not interfere with each other, and since signal loss and heat generation are very low, optical communication has gradually become the mainstream technology for long-distance data transmission.