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?

<P0-S0> A Don is a village in south-eastern Laos near the border with Vietnam. <P0-S1> It is located in Kaleum District in Sekong Province. <SEP> <P1-S0> the chechidla range is a mountain range in northernwestern british columbia, canada, located about west of dease lake and 125–150 km south-southeast of atlin. <P1-S1> it has an area of 3236 km and lies roughly in between the whiting and sutlahine rivers on the west and northwest and the samotua and sheslay on the east. <P1-S2> it is a subrange of the boundary ranges which in turn form part of the coast mountains of the pacific cordillera mountain system. <P1-S3> the whiting river has its source in the range. <P1-S4> the range's name is an approximation of a phrase in the tahltan language meaning "mountains of small rocks". <SEP> <P2-S0> the 2018 winter olympics, officially known as the xxiii olympic winter games (korean: 제 23 회동계올림픽, translit. <P2-S1> jeisipsamhoe donggye ollimpik) and commonly known as pyeongchang 2018, was an international winter multi-sport event held between 9 and 25 february 2018 in pyeongchang county, gangwon province, south korea, with the opening rounds for certain events held on 8 february 2018, the eve of the opening ceremony. <P2-S2> pyeongchang was elected as the host city in july 2011, during the 123rd ioc session in durban, south africa. <P2-S3> this was the first time that south korea had hosted the winter olympics and the second olympics held in the country overall, after the 1988 summer olympics in seoul. <P2-S4> it was the third time that an east asian country had hosted the winter games, after sapporo (1972) and nagano (1998), both in japan. <P2-S5> it was also the first of three consecutive olympics to be held in east asia, the other two being the 2020 summer olympics in tokyo and the 2022 winter olympics in beijing. <SEP> <P3-S0> The final tournament hosts Thailand decided to participate in qualification despite having automatically qualified for the final tournament. <P3-S1> Of the 47 AFC member associations, a total of 44 teams entered the competition. <SEP> <P4-S0> In December 2014, Myanmar signed an agreement to set up its first stock exchange. <P4-S1> The Yangon Stock Exchange (YSX) officially opened for business on Friday, March 25, 2016. <P4-S2> 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). <P4-S3> 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. <SEP> <P5-S0> Myanmar (also known as Burma) is the northwestern-most country of mainland Southeast Asia, bordering China, India, Bangladesh, Thailand and Laos. <P5-S1> It lies along the Indian and Eurasian Plates, to the southeast of the Himalayas. <P5-S2> To its west is the Bay of Bengal and to its south is the Andaman Sea. <P5-S3> It is strategically located near major Indian Ocean shipping lanes.