 Hello and welcome. We're here today with Wei Feng, who's the Chairman of ITUT's Study Group 11, which is historically looking at protocols and has now had software-defined networks and some conformity and interoperability issues added to its remit. So welcome, Wei Feng. Hello. Nice being here and talk with you. I wonder if you could start by please outlining some of the key achievements of the previous study period between 2009 and 2012. Well, I think in the last study period, we mainly focused on the engine-related work period on the signal requirement and protocol, addressing those of the protocol related to the IP area. You have those special related to the QIS protocols. We produce a package of QIS protocols that can adapt to the fixed and mobile network, and that's the, you can see it's quite popular in the industry. And also we produce the protocol and the signal requirement for the engine services. And you have those, you know, voice and video and also the data service and how to, you know, guarantee, you know, the interoperability. That's the job of the work at S11. And I think during the last study period, one of the most important work is the performance and the interoperability. Within S11, we have one special working party that's addressing these issues, and we attract quite a lot of participation from developing countries. You can see China and Russia and those countries, they contribute a lot. Also, we have developed countries like Japan and other countries, they contribute a lot. I think gradually we see in ITUT, we see more and more participation on these areas and all industries also notice the importance of the, you know, CNI. And also for the CNI, it's not only just provide the testing package for industry, it's also a way for the developing countries to know the technologies. And, you know, based through the testing, the equipment, and we know how technology involved and how, you know, we can save the cost for, you know, our customers. That's all the issues, you know, our CNI program try to address. And clearly, WTSA significantly increased your work in the area of conformity and interoperability. But it also added a new topic to study group 11's remit that was software-defined networking. I wonder if you could tell us a little bit about that and the importance of that work taking place in ITUT across the two groups, study group 11 and study group 13. Yes, you are right. I think CNI is one issue. And for this industry, we always, you know, notice the converge of the technology, especially the term of ICT. Now in the past, IP influenced telecom a lot. So we have so-called NGN, that's IP-enabled network. Now the new concept is something called, you know, SDN. It's one kind of the future network, and it's purely IT-oriented. And that's something that the SDE level can make a role. Since IT technology is quite different from our traditional telecommunications, normally they have, you know, the top-to-the-down process. Normally you have the architecture requirement and you go to the, you know, the protocol and the way to implement. But IT ways are just opposite. They from the bottom to the up. They have bricks and then they build the whole picture. And for protocols, if you notice during the last 15 years, the name of SDE level never changes. It's only with regard to the technique, the ways to implement those services. So SDE level is quite, you know, adapt to this IT concept. That's the blocks and the bricks, and we try to adapt and to see how it can, you know, be used in our telecom network. Okay. Well, thank you very much, Wei Feng, for giving us an overview of study group 11's work in the past and for the next few years. Thank you.