Chinese media report that according to their informed sources, the Tesla Model Y will debut in China at the 2019 Shanghai Auto Show, which will be held from April 16 to April 24. In addition, it is expected that Tesla's electric truck Semi will be unveiled in the US by the end of 2019. The person familiar with the matter also revealed that once Musk completes the SEXY series, Tesla may update or replace the existing models in 2020.We know so far that Model Y will be based on the Model 3 platform and will share around 75% of its components with the Model 3. It is expected to be a compact crossover SUV with a third seat row and a cruising range that will exceed 250 miles. The car will arrive with level L3.5 autopilot hardware, supporting L4 level autopilot technology. The model is scheduled for production at the US Gigafactory outside Reno by August 2020 and by September the same year, Tesla hopes to build 2000 Model Y units per week. At the beginning of January 2019, Tesla released the price of the Model Y entry-level trim which is expected to be between $35,000-$40,000. Tesla plans to establish a Model Y production line at its Gigafactory 3 plant in China in October 2020, which will produce entry-level Model Y units, which are created especially for the Chinese market. Elon Musk has directly said that March 15th sounds like a good date for announcing the Model Y in the US, hence announcing the Model Y in China a month later sounds credible, if indeed March 15th is the US official announcement date.Tesla's electric truck Semi has already begun to accept reservations, but the car has never been unveiled in China. Since Musk believes that China is an important overseas market for Tesla and has begun to build factories there, the appearance of this car in China is also very important and necessary. The previously exposed news about Semi shows that it has a maximum load of 36.29 tons and four independent motors installed on the rear axle. The maximum cruising range is 805 km, which is very suitable for long-distance transportation in China.As long as it concerns the rest of the information that the Model S and Model X will be updated in 2020, this is simply speculation, which however might turn out true. After all, electric cars resemble modern gadgets in many ways and with fast developing technologies updates might become a necessity sooner than expected. With various different sources pointing at the fact that Tesla is trying to improve its batteries and offer an extended range (hopefully lower prices, too), it is not that far-stretched to expect a Model S and Model X update within the next couple of years.Here's a full list of currently existing Tesla models specifications