A black line separates from the black seal and blends into the ground.

Then there's the waiting.

One second.

Two seconds.

Three seconds.

Five seconds.

Finally, a cold mechanical sound sounded in his ears.

'Do you want to strengthen the entire safe house?'

At the same time, huge black countdown numbers appeared on the ground at Yu Hong's feet.

‘11:07 on the 24th.’

‘It can really be done!!’ Yu Hong opened his eyes wide and suddenly became energetic.

He knows what this means very well. It means that in the future expansion and renovation of the safe house, he does not need to learn techniques or find people for help. He only needs to rely on the continuous synthesis and strengthening of the black seal!

'Since it is possible to strengthen the entire safe house, then I can definitely strengthen each cabin individually!'

Yu Hong was in high spirits, filled with joy, as if his mind had been opened. He quickly stood up, walked to the wall, stretched out his hand and pressed it gently against the wall.

'Strengthen this cabin, direction: increase the number of connected cabins, the number is 1,.'

This time, he did not add five cabins at once, but only added one cabin. He did not ask for any other enhancements, just to judge how much time it would take to strengthen the cabins.

Soon, black lines flowed out, and a countdown appeared on the wall.

‘11:02 on the 4th.’

"It's only been more than four days! This is much faster than digging it myself!" Yu Hong's heart was shocked, and his face showed joy.

Although his strength has greatly increased and his physique has improved greatly, it is much more difficult to dig out rocks than to dig out soil. Therefore, even with his current strength, it is impossible to dig out a good cabin in four days.

'The key is that after the black seal is strengthened, it is likely that everything was perfected by me. The flatness of the wall, the integrity of the entire cabin, and the beauty are much better than what I could do myself.'
Chapter completed!