--- a/db.txt
+++ b/db.txt
@@ -347,9 +347,9 @@ country CL: DFS-JP
 	(5735 - 5835 @ 80), (20)
 
 country CN: DFS-FCC
-	(2402 - 2482 @ 40), (20)
-	(5170 - 5250 @ 80), (23), AUTO-BW
-	(5250 - 5330 @ 80), (23), DFS, AUTO-BW
+	(2402 - 2482 @ 40), (30)
+	(5170 - 5250 @ 80), (30), AUTO-BW
+	(5250 - 5330 @ 80), (30), AUTO-BW
 	(5735 - 5835 @ 80), (30)
 	# 60 GHz band channels 1,4: 28dBm, channels 2,3: 44dBm
 	# ref: http://www.miit.gov.cn/n11293472/n11505629/n11506593/n11960250/n11960606/n11960700/n12330791.files/n12330790.pdf
@@ -1580,13 +1580,13 @@ country UG: DFS-FCC
 country US: DFS-FCC
 	(2400 - 2483.5 @ 40), (30)
 	# 5.15 ~ 5.25 GHz: 30 dBm for master mode, 23 dBm for clients
-	(5150 - 5250 @ 80), (23), AUTO-BW
-	(5250 - 5350 @ 80), (23), DFS, AUTO-BW
+	(5150 - 5250 @ 80), (30), AUTO-BW
+	(5250 - 5350 @ 80), (30), AUTO-BW
 	# This range ends at 5725 MHz, but channel 144 extends to 5730 MHz.
 	# Since 5725 ~ 5730 MHz belongs to the next range which has looser
 	# requirements, we can extend the range by 5 MHz to make the kernel
 	# happy and be able to use channel 144.
-	(5470 - 5730 @ 160), (23), DFS
+	(5470 - 5730 @ 160), (30)
 	(5730 - 5850 @ 80), (30)
 	# 60g band
 	# reference: section IV-D https://docs.fcc.gov/public/attachments/FCC-16-89A1.pdf