The two Koreas continued their restoration of contact lines this week, reestablishing a military hotline on Thursday after resolving technical problems two days after Seoul and Pyongyang announced they had reestablished other inter-Korean communication channels.

The East Sea military hotline between the South and North was fully restored at 9 a.m., South Korea’s Ministry of Defense confirmed to NK News. The ministry added that the two sides “exchanged information about illegal Chinese fishing vessels” through the West Sea hotline on Thursday.

South Korean officials have now announced the resumption of contacts over four inter-Korean communication channels since Tuesday: one