Table:
text: 2011 World Championships in Athletics – Men's 20 kilometres walk
Results
Final
Rank_ Athlete Nationality Time_ Notes_
1 Valeriy Borchin Russia 1:19:56 
2 Vladimir Kanaykin Russia 1:20:27 
3 Luis Fernando López Colombia 1:20:38 SB
4 Wang Zhen China 1:20:54 
5 Stanislav Emelyanov Russia 1:21:11 
6 Kim Hyun-sub South Korea 1:21:17 
7 Ruslan Dmytrenko Ukraine 1:21:31 SB
8 Yusuke Suzuki Japan 1:21:39 
9 Alex Schwazer Italy 1:21:50 SB
10 Erick Barrondo Guatemala 1:22:08 
11 Chu Yafei China 1:22:10 
12 Sergey Morozov Russia 1:22:37 
13 Wang Hao China 1:22:49 
14 Matej Tóth Slovakia 1:22:55 
15 Eder Sánchez Mexico 1:23:05 
16 João Vieira Portugal 1:23:26 
17 Miguel Ángel López Spain 1:23:41 
18 Anton Kucmin Slovakia 1:23:57

Question: How many participants were from Russia in the 2011 IAAF World Championships - men's 20 km walk?

Question: At the 2011 World Athletics Championships - men's 20 km walk, Wang Zhen and Wang Hao were both from which country?