diff -uprN a/db.txt b/db.txt
--- a/db.txt	2020-01-06 19:33:27.707188000 +0800
+++ b/db.txt	2020-01-06 19:39:28.663199594 +0800
@@ -291,15 +291,15 @@ 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), DFS, 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
-	(57240 - 59400 @ 2160), (28)
+	(57240 - 59400 @ 2160), (30)
 	(59400 - 63720 @ 2160), (44)
-	(63720 - 65880 @ 2160), (28)
+	(63720 - 65880 @ 2160), (30)
 
 country CO: DFS-FCC
 	(2402 - 2482 @ 40), (20)