 It's a picture of Shanghai in a smoky day. This kind of situation is not uncommon in China nowadays. Forced energy is the main source of energy in China, but on the other hand, it also leads to serious environmental problems. The demand of energy will be growing for the next two decades. The ultimate clean energy is renewables, but then there will not be enough in the next 20 years for economy, for societal development. Natural gas as a cleaner form of fossil fuel will fill the gap, which we will serve as a bridge from coal to renewables. The burning of natural gas will produce immense less proteins, such as carbon dioxide, NOx, SOx, and other dust. Natural gas can be used for heating, power generation, chemical manufacturing, and also for transportation. So in China, natural gas only accounts for 6%, actually less than 6% of total energy consumption, but the demand is growing. The gap between demand and production will be enlarging for the next 20 years. On the other hand, US, the situation is different because of the share gas revolution. Here shows two basins with similar areas, similar geology, but the productivity is very different. In the US, this year, production is over 200 billion cubic meters. In China, we project to produce 6.5 billion cubic meters of gas. So what's the reason? The reason is technology. Here shows two technologies, horizontal drilling and multi-stage fracturing. These two technologies constitute the technology needed for share gas revolution in the US. China is trying to catch up, trying to reproduce the success of share gas development in the US. So in order to study the fundamentals of share gas production in the subsurface, we launched several large-scale projects from nanoscale to microscopic to millimeter to the field scale. So we started the gas in nanopores. This shows the simulation we did with molecular dynamics, starting the flow and the nanopore diffusion, desorption, and sorption at this fundamental scale. Then the upscale to microscopic scale, then compared with the theoretical model, we come up in our lab. So we mentioned hydraulic fracturing. These are the two we generated to simulate the happening, the occurring, and propagation of hydraulic fractures. Here shows the size of the fractures with time. The size of fracture indicates the zones, beautiful share gas production. Using the same tool, we can look at different designs of hydraulic fracturing. So as you can see, with a different distance between the cluster of perforation, you lead to different performance of a fracture zone, then also lead to different productivity. In the fractures, we also inject propane, which are the solid particles inject along with fluids used to open up the fractures created to enhance permeability, which is the ability for gas to flow in the subsurface. So we have detailed study showing the flow and distribution of propane. We developed advanced mathematical and numerical simulator to study the flow in the subsurface. Here's simulate the situation in the US, in the gas field. We can use the same simulator to simulate what's happening in Sichuan basin, which is the key basin in China. Share gas production, the world is an important issue. There are several world-related procedures like acquisition of water, chemical mixing, injection, treatment, and disposal of water. There are environmental risks associated with any of these procedures. So we have to be really careful. In the US, production of share gas did not cost much environmental problems. And at a state level, the use of water is pretty small, less than 1%. But in China, the share gas place are distributed in the areas with water scarcity. So the water issue could be important. Okay, let me summarize. For the next two decades, the demand of energy will be growing. Renewables are not enough. So share gas, in general, natural gas, serve as a bridge from coal to renewables. The question to the audience is, how can we produce share gas in an environmentally friendly way? How can we reproduce the success of the US share gas revolution in China and other countries? Thank you.