Question: There exists a country A that forms a boundary between the host of the 2020 AFC U-23 Championship and the country containing the village of A Don. What is the business that began trading stocks in the winter of 2014 in country A?

Knowledge 1: 2020 AFC U-23 Championship qualification
Of the 47 AFC member associations, a total of 44 teams entered the competition. The final tournament hosts Thailand decided to participate in qualification despite having automatically qualified for the final tournament. [SEP] Knowledge 2: Myanmar
In December 2014, Myanmar signed an agreement to set up its first stock exchange. The Yangon Stock Exchange Joint Venture Co. Ltd will be set up with Myanma Economic Bank sharing 51 percent, Japan's Daiwa Institute of Research Ltd 30.25 percent and Japan Exchange Group 18.75 percent. The Yangon Stock Exchange (YSX) officially opened for business on Friday, March 25, 2016. First Myanmar Investment Co., Ltd. (FMI) became the first stock to be traded after receiving approval for an opening price of 26,000 kyats ($22). [SEP] Knowledge 3: Geography of Myanmar
Myanmar (also known as Burma) is the northwestern-most country of mainland Southeast Asia, bordering China, India, Bangladesh, Thailand and Laos. It lies along the Indian and Eurasian Plates, to the southeast of the Himalayas. To its west is the Bay of Bengal and to its south is the Andaman Sea. It is strategically located near major Indian Ocean shipping lanes. [SEP] Knowledge 4: A Don
A Don is a village in south-eastern Laos near the border with Vietnam. It is located in Kaleum District in Sekong Province.
Knowledge 1: A Don
A Don is a village in south-eastern Laos near the border with Vietnam. It is located in Kaleum District in Sekong Province. [SEP] Knowledge 2: 2020 AFC U-23 Championship qualification
Of the 47 AFC member associations, a total of 44 teams entered the competition. The final tournament hosts Thailand decided to participate in qualification despite having automatically qualified for the final tournament. [SEP] Knowledge 3: Geography of Myanmar
Myanmar (also known as Burma) is the northwestern-most country of mainland Southeast Asia, bordering China, India, Bangladesh, Thailand and Laos. It lies along the Indian and Eurasian Plates, to the southeast of the Himalayas. To its west is the Bay of Bengal and to its south is the Andaman Sea. It is strategically located near major Indian Ocean shipping lanes. [SEP] Knowledge 4: Myanmar
In December 2014, Myanmar signed an agreement to set up its first stock exchange. The Yangon Stock Exchange Joint Venture Co. Ltd will be set up with Myanma Economic Bank sharing 51 percent, Japan's Daiwa Institute of Research Ltd 30.25 percent and Japan Exchange Group 18.75 percent. The Yangon Stock Exchange (YSX) officially opened for business on Friday, March 25, 2016. First Myanmar Investment Co., Ltd. (FMI) became the first stock to be traded after receiving approval for an opening price of 26,000 kyats ($22).
Knowledge 1: A Don
A Don is a village in south-eastern Laos near the border with Vietnam. It is located in Kaleum District in Sekong Province. [SEP] Knowledge 2: Myanmar
In December 2014, Myanmar signed an agreement to set up its first stock exchange. The Yangon Stock Exchange Joint Venture Co. Ltd will be set up with Myanma Economic Bank sharing 51 percent, Japan's Daiwa Institute of Research Ltd 30.25 percent and Japan Exchange Group 18.75 percent. The Yangon Stock Exchange (YSX) officially opened for business on Friday, March 25, 2016. First Myanmar Investment Co., Ltd. (FMI) became the first stock to be traded after receiving approval for an opening price of 26,000 kyats ($22). [SEP] Knowledge 3: Geography of Myanmar
Myanmar (also known as Burma) is the northwestern-most country of mainland Southeast Asia, bordering China, India, Bangladesh, Thailand and Laos. It lies along the Indian and Eurasian Plates, to the southeast of the Himalayas. To its west is the Bay of Bengal and to its south is the Andaman Sea. It is strategically located near major Indian Ocean shipping lanes. [SEP] Knowledge 4: 2020 AFC U-23 Championship qualification
Of the 47 AFC member associations, a total of 44 teams entered the competition. The final tournament hosts Thailand decided to participate in qualification despite having automatically qualified for the final tournament.

Answer: Yangon Stock Exchange Joint Venture Co. Ltd