Artists perform on stage during the Fourth China Tibet Tourism and Culture Expo in Lhasa, capital of southwest China`s Tibet Autonomous Region, Sept. 7, 2018. The five-day expo will last untill Sept. 11. (Xinhua/Liu Dongjun)

Fireworks light up the sky during the Fourth China Tibet Tourism and Culture Expo in Lhasa, capital of southwest China`s Tibet Autonomous Region, Sept. 7, 2018. The five-day expo will last untill Sept. 11. (Xinhua/Liu Dongjun)

Artists perform on stage during the Fourth China Tibet Tourism and Culture Expo in Lhasa, capital of southwest China`s Tibet Autonomous Region, Sept. 7, 2018. The five-day expo will last untill Sept. 11. (Xinhua/Dainzin Nyima Choktrul)

Artists perform on stage during the Fourth China Tibet Tourism and Culture Expo in Lhasa, capital of southwest China`s Tibet Autonomous Region, Sept. 7, 2018. The five-day expo will last untill Sept. 11. (Xinhua/Liu Dongjun)

Artists perform on stage during the Fourth China Tibet Tourism and Culture Expo in Lhasa, capital of southwest China`s Tibet Autonomous Region, Sept. 7, 2018. The five-day expo will last untill Sept. 11. (Xinhua/Chogo)

Artists perform on stage during the Fourth China Tibet Tourism and Culture Expo in Lhasa, capital of southwest China`s Tibet Autonomous Region, Sept. 7, 2018. The five-day expo will last untill Sept. 11. (Xinhua/Dainzin Nyima Choktrul)

Artists perform on stage during the Fourth China Tibet Tourism and Culture Expo in Lhasa, capital of southwest China`s Tibet Autonomous Region, Sept. 7, 2018. The five-day expo will last untill Sept. 11. (Xinhua/Dainzin Nyima Choktrul)

Artists perform on stage during the Fourth China Tibet Tourism and Culture Expo in Lhasa, capital of southwest China`s Tibet Autonomous Region, Sept. 7, 2018. The five-day expo will last untill Sept. 11. (Xinhua/Liu Dongjun)

Artists perform on stage during the Fourth China Tibet Tourism and Culture Expo in Lhasa, capital of southwest China`s Tibet Autonomous Region, Sept. 7, 2018. The five-day expo will last untill Sept. 11. (Xinhua/Liu Dongjun)

Artists perform on stage during the Fourth China Tibet Tourism and Culture Expo in Lhasa, capital of southwest China`s Tibet Autonomous Region, Sept. 7, 2018. The five-day expo will last untill Sept. 11. (Xinhua/Dainzin Nyima Choktrul)

Artists perform on stage during the Fourth China Tibet Tourism and Culture Expo in Lhasa, capital of southwest China`s Tibet Autonomous Region, Sept. 7, 2018. The five-day expo will last untill Sept. 11. (Xinhua/Dainzin Nyima Choktrul)

Artists perform on stage during the Fourth China Tibet Tourism and Culture Expo in Lhasa, capital of southwest China`s Tibet Autonomous Region, Sept. 7, 2018. The five-day expo will last untill Sept. 11. (Xinhua/Liu Dongjun)

A woman tries on a wind coat during the Fourth China Tibet Tourism and Culture Expo in Lhasa, capital of southwest China`s Tibet Autonomous Region, Sept. 8, 2018. The five-day expo will last untill Sept. 11. (Xinhua/Chogo)

A visitor tastes the dessert during the Fourth China Tibet Tourism and Culture Expo in Lhasa, capital of southwest China`s Tibet Autonomous Region, Sept. 8, 2018. The five-day expo will last untill Sept. 11. (Xinhua/Chogo)