Are there any signed contracts between Myanmar and Thailand?

There are three (3) agreements signed between Myanmar and Thailand.They are:
(a) Trade agreement between Myanmar and Thailand  was signed On April 12 ,1989 in Yangon, Myanmar.
(b) A Memorandum of Understanding on Establishment of a joint trade committee between Myanmar and Thailand  was signed On February 2,1990 in Yangon, Myanmar.
(c) Border Trade Agreement between Myanmar and Thailand was signed On March 17, 1996  in Yangon,Myanmar.

Are there any signed contracts between Myanmar and the Republic of Korea?

There are two (2) agreements signed between Myanmar and the Republic of Korea.They are:
(a)  Trade Agreement between Myanmar and the Republic of Korea was signed  On September 30,1967 in Yangon,Myanmar.
(b) A Memorandum of Understanding on cooperation of trade and industrial between Myanmar and the Republic of Korea was signed on September 3,2019 in Nay Pyi Taw, Myanmar.

Are there any signed contracts between Myanmar and the Lao People's Democratic Republic?

There are two (2) contracts signed between Myanmar and Lao People's Democratic Republic.They are:
(a) Trade Agreement between Myanmar and Lao People's Democratic Republic was signed On May 8,1995 in Yangon, Myanmar.
(b) The Basic Agreement on Border Trade between Myanmar and Lao People's Democratic Republic was signed On December 6, 2000 in Vientiane,Vietnam.