In the import origins of PSF, Myanmar appeared in 2017, and the overall imports were not much

In the import origins of PSF, Myanmar appeared in 2017, and the overall imports were not much. In 2019, one HC re-PSF production line in Hangzhou was moved to Myanmar, and has not started production till now. In 2020, imports declined sharply. In 2021, operation was unstable affected by the epidemi