--- a/db.txt
+++ b/db.txt
@@ -425,9 +425,8 @@ country CL: DFS-JP
 # https://www.miit.gov.cn/cms_files/filemanager/1226211233/attach/20236/d1dc19424d5a4cfe90d631adeee8dd58.pdf
 # Note: The transmit power for 5250-5350MHz bands can be raised by 3dBm when TPC is implemented
 country CN: DFS-FCC
-	(2400 - 2483.5 @ 40), (20)
-	(5150 - 5250 @ 80), (23), NO-OUTDOOR, AUTO-BW
-	(5250 - 5350 @ 80), (20), NO-OUTDOOR, DFS, AUTO-BW
+	(2400 - 2483.5 @ 40), (30)
+	(5150 - 5350 @ 160), (30)
 	(5725 - 5850 @ 80), (33)
 	# 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
@@ -1940,14 +1939,12 @@ country US: DFS-FCC
 	(920 - 928 @ 8), (30)
 	(2400 - 2472 @ 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), (24), DFS, AUTO-BW
+	(5150 - 5350 @ 160), (30)
 	# 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), (24), DFS
-	(5730 - 5850 @ 80), (30), AUTO-BW
+	(5470 - 5850 @ 160), (30)
 	# https://www.federalregister.gov/documents/2021/05/03/2021-08802/use-of-the-5850-5925-ghz-band
 	# max. 33 dBm AP @ 20MHz, 36 dBm AP @ 40Mhz+, 6 dB less for clients
 	(5850 - 5895 @ 40), (27), NO-OUTDOOR, AUTO-BW, NO-IR